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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.

A058307 a(n) = (n+1)*a(n-1) + a(n-2), with a(0)=0, a(1)=1.

Table of values

n a(n)
0 0
1 1
2 3
3 13
4 68
5 421
6 3015
7 24541
8 223884
9 2263381
10 25121075
11 303716281
12 3973432728
13 55931774473
14 842950049823
15 13543132571641
16 231076203767720
17 4172914800390601
18 79516457411189139
19 1594502063024173381
20 33564059780918830140
21 740003817243238436461
22 17053651856375402868743

List of values

[0, 1, 3, 13, 68, 421, 3015, 24541, 223884, 2263381, 25121075, 303716281, 3973432728, 55931774473, 842950049823, 13543132571641, 231076203767720, 4172914800390601, 79516457411189139, 1594502063024173381, 33564059780918830140, 740003817243238436461, 17053651856375402868743]

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

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