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.

A159722 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 2 local maxima.

Table of values

n a(n)
2 12
3 576
4 17376
5 448800
6 10861056
7 253940736
8 5807161344
9 130675728384
10 2903978803200
11 63887897001984
12 1393919508086784
13 30201597684350976
14 650495989232173056
15 13939199950454784000
16 297369599774111563776
17 6319103998978368208896
18 133816319995412169621504

List of values

[12, 576, 17376, 448800, 10861056, 253940736, 5807161344, 130675728384, 2903978803200, 63887897001984, 1393919508086784, 30201597684350976, 650495989232173056, 13939199950454784000, 297369599774111563776, 6319103998978368208896, 133816319995412169621504]

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

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