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.

A384470 a(n) = n! * Sum_{k=0..n} Stirling2(2*k,k) * Stirling2(2*n-2*k,n-k) / binomial(n,k).

Table of values

n a(n)
0 1
1 2
2 29
3 1108
4 82924
5 10302768
6 1917699552
7 499332175200
8 173242955039616
9 77238974345915520
10 43027312823342164800
11 29285800226400628915200
12 23913110797474508388449280
13 23071378298963178620672409600
14 25964692904608781751347296204800
15 33711625062334209438536728660070400

List of values

[1, 2, 29, 1108, 82924, 10302768, 1917699552, 499332175200, 173242955039616, 77238974345915520, 43027312823342164800, 29285800226400628915200, 23913110797474508388449280, 23071378298963178620672409600, 25964692904608781751347296204800, 33711625062334209438536728660070400]