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.

A342196 a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k)^2 * a(k-1).

Table of values

n a(n)
0 1
1 1
2 5
3 23
4 155
5 1355
6 14371
7 183911
8 2781283
9 48726355
10 976903875
11 22183097191
12 565060532965
13 16016170519017
14 501714014484813
15 17265124180702953
16 649178961366102597
17 26544344366333824055
18 1175291769917975444817
19 56133021061270139242637
20 2881893164859601701738005

List of values

[1, 1, 5, 23, 155, 1355, 14371, 183911, 2781283, 48726355, 976903875, 22183097191, 565060532965, 16016170519017, 501714014484813, 17265124180702953, 649178961366102597, 26544344366333824055, 1175291769917975444817, 56133021061270139242637, 2881893164859601701738005]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.