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.

A385984 a(0) = 1; a(n) = Sum_{k=0..n-1} (-2)^k * binomial(n-1,k) * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 -1
3 -9
4 57
5 1353
6 -38313
7 -2796417
8 339169041
9 90178580529
10 -45316930884849
11 -46917802526957721
12 95533688640942728073
13 392558870984301366092217
14 -3210372581644929567134113497
15 -52647023496165910533698485658193
16 1724296469950918188679460249845485729

List of values

[1, 1, -1, -9, 57, 1353, -38313, -2796417, 339169041, 90178580529, -45316930884849, -46917802526957721, 95533688640942728073, 392558870984301366092217, -3210372581644929567134113497, -52647023496165910533698485658193, 1724296469950918188679460249845485729]