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.

A159723 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 local maxima.

Table of values

n a(n)
1 0
2 2
3 924
4 130672
5 11798800
6 882163680
7 60299781248
8 3933244436480
9 249755233812480
10 15590436752711680
11 961617113393102848
12 58776390094965178368
13 3566492692755774439424
14 215104023517101044006912
15 12906638765341805641728000
16 770965701556822810254376960

List of values

[0, 2, 924, 130672, 11798800, 882163680, 60299781248, 3933244436480, 249755233812480, 15590436752711680, 961617113393102848, 58776390094965178368, 3566492692755774439424, 215104023517101044006912, 12906638765341805641728000, 770965701556822810254376960]

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

Content is available under The OEIS End-User License Agreement.