37

Answers

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3

Enumerating unlabeled trees with degree at most 3

13

Show that this ratio of factorials is always an integer

4

Hypergeometric identities

7

Sign of coefficients

2

Cyclically symmetric functions

5

Name of certain combinatorial numbers?

2

Reference request on symmetric polynomials

3

trigonometric identity needed for sums involving secants

2

What is the cardinality of the family of unlabelled bipartite graphs on n vertices?

14

Combinatorial meaning of the functional equation for logarithm

9

Interpolating a sum of binomial coefficients using a sin function

4

How to prove recursion formulas for Stirling numbers?

1

A list of symmetric statistics

7

Faa di Bruno’s formula for inverse functions ?

5

Computer package for representation theory of the symmetric group

2

Reference request : an elementary product-sum formula for binomial coefficients

1

Number of Ordered Trees of given degree sequence

1

Generating function for Dyck Words

6

generating function for regular tournaments

4

Identifying factors of higher order in a determinant

5

Circular Permutations With Identical Objects

10

Number of integer combinations x_1 < … < x_n ?

3

Zeros of “exponential” function

7

Sum of products of exponentials and polynomials

4

hypergeometric closed form for z=1/4,-1/3

7

Implications of a relation on algebraic numbers

16

The Matrix-Tree Theorem without the matrix

13

Number of closed walks on an $n$-cube

13

Use of everywhere divergent generating functions

8

Counting card distributions when cards are duplicated