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.

A376137 a(0) = 1; a(n) = Sum_{k=0..n-1} (-1)^k * (k+1)^2 * a(k) * a(n-k-1).

Table of values

n a(n)
0 1
1 1
2 -3
3 -34
4 495
5 13631
6 -467404
7 -23984426
8 1490938299
9 123999435015
10 -12164649041259
11 -1497474725212924
12 212746558833692052
13 36393896155519042476
14 -7062273474686464802160
15 -1603475573855830444120802
16 407344895625777134555939139
17 118552169162473363108837155199
18 -38177398083353809033748641523305

List of values

[1, 1, -3, -34, 495, 13631, -467404, -23984426, 1490938299, 123999435015, -12164649041259, -1497474725212924, 212746558833692052, 36393896155519042476, -7062273474686464802160, -1603475573855830444120802, 407344895625777134555939139, 118552169162473363108837155199, -38177398083353809033748641523305]