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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.

A346432 a(0) = 1; a(n) = n! * Sum_{k=0..n-1} (n-k+1) * a(k) / k!.

Table of values

n a(n)
0 1
1 2
2 14
3 144
4 1968
5 33600
6 688320
7 16450560
8 449326080
9 13806858240
10 471395635200
11 17703899136000
12 725338710835200
13 32193996432998400
14 1538840509503897600
15 78808952068374528000
16 4305129487814098944000
17 249876735246162984960000
18 15356385691181506363392000

List of values

[1, 2, 14, 144, 1968, 33600, 688320, 16450560, 449326080, 13806858240, 471395635200, 17703899136000, 725338710835200, 32193996432998400, 1538840509503897600, 78808952068374528000, 4305129487814098944000, 249876735246162984960000, 15356385691181506363392000]

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

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