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.

A152498 1/3 of the number of permutations of 2 indistinguishable copies of 1..n with exactly 6 local maxima.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 76739
7 42734373
8 10478384089
9 1717626773713
10 222419564005134
11 24781841211038024
12 2496351029911357950
13 234485896532293552830
14 20959967704130971672341
15 1807748255927878129526087
16 151901517836714997413430591
17 12521620421275657891377640951

List of values

[0, 0, 0, 0, 0, 76739, 42734373, 10478384089, 1717626773713, 222419564005134, 24781841211038024, 2496351029911357950, 234485896532293552830, 20959967704130971672341, 1807748255927878129526087, 151901517836714997413430591, 12521620421275657891377640951]

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

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