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.

A365530 a(n) = Sum_{k=0..floor((n-2)/5)} Stirling2(n,5*k+2).

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 7
5 15
6 31
7 64
8 155
9 717
10 6391
11 65010
12 629444
13 5719597
14 49340838
15 408864186
16 3284672489
17 25770192646
18 198718943490
19 1516391860879
20 11554571944615
21 89144035246500
22 711587142257776
23 6054854693784594
24 56609279400922224
25 590143167134961765

List of values

[0, 0, 1, 3, 7, 15, 31, 64, 155, 717, 6391, 65010, 629444, 5719597, 49340838, 408864186, 3284672489, 25770192646, 198718943490, 1516391860879, 11554571944615, 89144035246500, 711587142257776, 6054854693784594, 56609279400922224, 590143167134961765]

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

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