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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.

A230345 Number of permutations of [2n+5] in which the longest increasing run has length n+5.

Table of values

n a(n)
0 1
1 12
2 181
3 3322
4 72540
5 1845480
6 53749920
7 1766525760
8 64739122560
9 2619453513600
10 116043825744000
11 5588681114016000
12 290812286052288000
13 16263827918642304000
14 973009916329651200000
15 62017234027123415040000
16 4195886889891954216960000

List of values

[1, 12, 181, 3322, 72540, 1845480, 53749920, 1766525760, 64739122560, 2619453513600, 116043825744000, 5588681114016000, 290812286052288000, 16263827918642304000, 973009916329651200000, 62017234027123415040000, 4195886889891954216960000]

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

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