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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.

A056543 a(n) = n*a(n-1) - 1 with a(1)=1.

Table of values

n a(n)
1 1
2 1
3 2
4 7
5 34
6 203
7 1420
8 11359
9 102230
10 1022299
11 11245288
12 134943455
13 1754264914
14 24559708795
15 368395631924
16 5894330110783
17 100203611883310
18 1803665013899579
19 34269635264092000
20 685392705281839999
21 14393246810918639978
22 316651429840210079515
23 7282982886324831828844

List of values

[1, 1, 2, 7, 34, 203, 1420, 11359, 102230, 1022299, 11245288, 134943455, 1754264914, 24559708795, 368395631924, 5894330110783, 100203611883310, 1803665013899579, 34269635264092000, 685392705281839999, 14393246810918639978, 316651429840210079515, 7282982886324831828844]

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

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