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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.

A321853 a(n) is the sum of the fill times of all 1-dimensional fountains given by the permutations in S_n.

Table of values

n a(n)
1 0
2 1
3 10
4 86
5 756
6 7092
7 71856
8 787824
9 9329760
10 118956960
11 1627067520
12 23786386560
13 370371536640
14 6122231942400
15 107109431654400
16 1977781262284800
17 38445562145894400
18 784885857270681600
19 16792523049093120000
20 375755553108633600000
21 8777531590107033600000

List of values

[0, 1, 10, 86, 756, 7092, 71856, 787824, 9329760, 118956960, 1627067520, 23786386560, 370371536640, 6122231942400, 107109431654400, 1977781262284800, 38445562145894400, 784885857270681600, 16792523049093120000, 375755553108633600000, 8777531590107033600000]

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

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