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.

A386443 a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} k^2 * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 2
3 11
4 120
5 2166
6 58642
7 2231959
8 113926332
9 7522541374
10 624529876412
11 63711767096254
12 7837308575551868
13 1144321503810951264
14 195687862794184808186
15 38747465910056072904383
16 8795888226933223095245628
17 2269380895962602685279019270
18 660399219910352767447886420340

List of values

[1, 1, 2, 11, 120, 2166, 58642, 2231959, 113926332, 7522541374, 624529876412, 63711767096254, 7837308575551868, 1144321503810951264, 195687862794184808186, 38747465910056072904383, 8795888226933223095245628, 2269380895962602685279019270, 660399219910352767447886420340]