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.

A159719 Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 5 local maxima.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 1480
6 1268292
7 279561086
8 36381368048
9 3573883594170
10 296395007981680
11 22044296362400136
12 1523944523765510064
13 100158396249221188476
14 6351609408030664973692
15 392562103869990035520330
16 23810390333486683269302048
17 1424190819067621511845096358

List of values

[0, 0, 0, 0, 1480, 1268292, 279561086, 36381368048, 3573883594170, 296395007981680, 22044296362400136, 1523944523765510064, 100158396249221188476, 6351609408030664973692, 392562103869990035520330, 23810390333486683269302048, 1424190819067621511845096358]

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

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