cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A376458 a(n) = Sum_{k = 0..n} (-1)^(n+k)*binomial(n, k)*binomial(n+k, k)*A108625(n-1, n-k).

Table of values

n a(n)
0 1
1 1
2 -7
3 1
4 569
5 -3749
6 -45151
7 806737
8 1052729
9 -130060889
10 740060243
11 16076432923
12 -238772815711
13 -1050791121197
14 49401000432497
15 -171944622257999
16 -7658491447803847
17 87632552103603679
18 768037618172427023
19 -22023427875902878553
20 19183786570616924819
21 4030690809877385503081
22 -33792039667279104716677
23 -520860578851790657166869

List of values

[1, 1, -7, 1, 569, -3749, -45151, 806737, 1052729, -130060889, 740060243, 16076432923, -238772815711, -1050791121197, 49401000432497, -171944622257999, -7658491447803847, 87632552103603679, 768037618172427023, -22023427875902878553, 19183786570616924819, 4030690809877385503081, -33792039667279104716677, -520860578851790657166869]