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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.

A291981 a(n) = n! * [x^n] exp(x)/(1 - log(1+x)).

Table of values

n a(n)
0 1
1 2
2 4
3 9
4 23
5 70
6 244
7 1015
8 4605
9 25090
10 137516
11 963589
12 5832243
13 54685670
14 310755964
15 4567695283
16 15162041017
17 581160322338
18 -1133608829900
19 115627157052929
20 -1056546484541681
21 34518230044201062
22 -541838359813821916
23 14135169210980556655
24 -288911084512245360587

List of values

[1, 2, 4, 9, 23, 70, 244, 1015, 4605, 25090, 137516, 963589, 5832243, 54685670, 310755964, 4567695283, 15162041017, 581160322338, -1133608829900, 115627157052929, -1056546484541681, 34518230044201062, -541838359813821916, 14135169210980556655, -288911084512245360587]

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

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