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.

A386452 a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} binomial(k+1,2) * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 2
3 9
4 71
5 856
6 14639
7 338086
8 10167592
9 386920264
10 18200571057
11 1037970049307
12 70605576249333
13 5649723531576365
14 525507834721871564
15 56235831305760575845
16 6861362229615344431713
17 946930149578851143467375
18 146781656943702604491445861
19 25394248429778915431816805711

List of values

[1, 1, 2, 9, 71, 856, 14639, 338086, 10167592, 386920264, 18200571057, 1037970049307, 70605576249333, 5649723531576365, 525507834721871564, 56235831305760575845, 6861362229615344431713, 946930149578851143467375, 146781656943702604491445861, 25394248429778915431816805711]