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Notamathematician
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Closed form for the A110501 (unsigned Genocchi numbers (of first kind) of even index)
Thank you for answer! What do you think about $$a(n) = \sum\limits_{i=1}^{n}i((i-1)!)^2T(n, i)(-1)^{n-i}.$$?
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revised
Fast and simple algorithm for the A329369
added 1 character in body
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Correctness of the algorithm for the A329369, A347205 and related sequences
If I understand correctly, you are just recursively calculating the first $N$ values. The code from my question allows you to calculate an individual term for very large $N$ without resorting to ordinary recursion, but using small vectors.
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