User Notamathematician

69 votes

2 answers

4k views

Function that produces primes

asked Mar 15, 2022 at 18:13

26 votes

1 answer

7k views

Elegant recursion for A301897

asked Jun 22, 2023 at 4:47

10 votes

1 answer

694 views

Prime numbers from permutation

asked Feb 14, 2022 at 9:27

10 votes

1 answer

625 views

Generating function for A261041

asked Sep 8 at 13:00

10 votes

1 answer

207 views

Generating function for A225114

asked Sep 4 at 13:23

9 votes

0 answers

258 views

On a continued fraction and vector $\nu$ of length $n$

asked Aug 15 at 12:55

7 votes

1 answer

701 views

One conjecture by sequencedb.net

asked Nov 14, 2021 at 18:01

7 votes

1 answer

792 views

Remarkable recursions for the A204262

asked Jul 11, 2023 at 9:00

7 votes

1 answer

527 views

Suitable closed form for the A079501

asked Apr 9 at 14:11

6 votes

1 answer

367 views

On A057985 and A287066

asked Apr 27 at 13:48

6 votes

1 answer

393 views

Test for pair of odd primes $(p, 2p^2-1)$

asked May 3 at 13:04

6 votes

0 answers

245 views

Searching for a proof of the pattern and identification of integer coefficients for the A329369

asked May 13 at 7:54

6 votes

2 answers

373 views

Sequence of $k^2$ and $2k^2$ ordered in ascending order

asked Dec 15, 2021 at 13:13

6 votes

1 answer

268 views

Sequence that sums up to the number of permutations avoiding the pattern $1-23-4$

asked Apr 24, 2023 at 11:24

5 votes

0 answers

133 views

Formula and smallest solution for the A260711

asked Feb 29 at 16:05

5 votes

1 answer

374 views

Closed-form for the number of partitions of $n$ avoiding the partition $(4,3,1)$

asked Dec 13, 2023 at 13:52

5 votes

1 answer

168 views

On a generating function and vector $\nu$ of length $n$

asked Aug 17 at 9:15

4 votes

1 answer

130 views

Intersecting algorithm for A065601

asked Aug 28 at 12:50

4 votes

1 answer

112 views

On a number of compositions of $n$ into positive triangular numbers

asked Sep 2 at 7:17

4 votes

1 answer

206 views

Partition numbers as the specific sums of the A161511

asked Dec 28, 2023 at 14:47

4 votes

0 answers

118 views

Something (which might be called multi-continued fraction) for the A112487

asked Jul 16, 2023 at 9:24

4 votes

1 answer

148 views

Closed form for the A110501 (unsigned Genocchi numbers (of first kind) of even index)

asked May 24 at 13:15

4 votes

0 answers

91 views

Closed form for subsequence of the partial sums of generalized A329369

asked May 2, 2023 at 12:30

4 votes

0 answers

167 views

Binary iterations, Fibonacci numbers and permutation of natural numbers

asked May 19, 2022 at 4:10

4 votes

1 answer

206 views

Prime numbers and number of partitions of $n$ into distinct parts with boundary size $2$

asked Dec 14, 2022 at 10:10

3 votes

0 answers

164 views

Closed form for $a(2^m(2^n-2^p-1))$

asked Nov 19, 2022 at 10:26

3 votes

1 answer

92 views

Partition of $(2^{n+1}+1)2^{2^{n-1}+n-1}-1$ into parts with binary weight equals $2^{n-1}+n$

asked Sep 15, 2022 at 6:33

3 votes

1 answer

140 views

Sequences that sum up to Dowling numbers

asked Apr 30, 2023 at 11:25

3 votes

1 answer

210 views

Powers of $2$ up to $2^{m-1}$ from a polynomial of degree $m-1$

asked Dec 6, 2022 at 14:36

3 votes

1 answer

324 views

Sum with Stirling numbers of the second kind

asked Oct 21, 2021 at 14:54

Stack Exchange Network

185 Questions

Function that produces primes

Elegant recursion for A301897

Prime numbers from permutation

Generating function for A261041

Generating function for A225114

On a continued fraction and vector $\nu$ of length $n$

One conjecture by sequencedb.net

Remarkable recursions for the A204262

Suitable closed form for the A079501

On A057985 and A287066

Test for pair of odd primes $(p, 2p^2-1)$

Searching for a proof of the pattern and identification of integer coefficients for the A329369

Sequence of $k^2$ and $2k^2$ ordered in ascending order

Sequence that sums up to the number of permutations avoiding the pattern $1-23-4$

Formula and smallest solution for the A260711

Closed-form for the number of partitions of $n$ avoiding the partition $(4,3,1)$

On a generating function and vector $\nu$ of length $n$

Intersecting algorithm for A065601

On a number of compositions of $n$ into positive triangular numbers

Partition numbers as the specific sums of the A161511

Something (which might be called multi-continued fraction) for the A112487

Closed form for the A110501 (unsigned Genocchi numbers (of first kind) of even index)

Closed form for subsequence of the partial sums of generalized A329369

Binary iterations, Fibonacci numbers and permutation of natural numbers

Prime numbers and number of partitions of $n$ into distinct parts with boundary size $2$

Closed form for $a(2^m(2^n-2^p-1))$

Partition of $(2^{n+1}+1)2^{2^{n-1}+n-1}-1$ into parts with binary weight equals $2^{n-1}+n$

Sequences that sum up to Dowling numbers

Powers of $2$ up to $2^{m-1}$ from a polynomial of degree $m-1$

Sum with Stirling numbers of the second kind