cp's OEIS Frontend

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.

A151658 Number of permutations of 8 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order.

Table of values

n a(n)
1 0
2 784
3 73200
4 3884640
5 182107936
6 8277726192
7 373396825488
8 16812327355840
9 756652360885056
10 34050346486482384
11 1532275508306401840
12 68952496159266606624
13 3102863293076011859040
14 139628857613659024861360
15 6283298684030318768507856
16 282748441663401954476011392

List of values

[0, 784, 73200, 3884640, 182107936, 8277726192, 373396825488, 16812327355840, 756652360885056, 34050346486482384, 1532275508306401840, 68952496159266606624, 3102863293076011859040, 139628857613659024861360, 6283298684030318768507856, 282748441663401954476011392]

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

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