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.

A386467 a(0) = a(1) = 1; a(n) = a(n-1) + a(n-2) + Sum_{k=0..n-1} k * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 3
3 11
4 56
5 353
6 2619
7 22175
8 210077
9 2196732
10 25104008
11 311139385
12 4156661566
13 59551385285
14 910955221547
15 14821776943015
16 255639834413712
17 4659720389150655
18 89515541970546889
19 1807824383345511646
20 38294715773270374886
21 849051935815301595992
22 19665430140710069083996

List of values

[1, 1, 3, 11, 56, 353, 2619, 22175, 210077, 2196732, 25104008, 311139385, 4156661566, 59551385285, 910955221547, 14821776943015, 255639834413712, 4659720389150655, 89515541970546889, 1807824383345511646, 38294715773270374886, 849051935815301595992, 19665430140710069083996]