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.

A151635 Number of permutations of 3 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.

Table of values

n a(n)
1 0
2 0
3 54
4 128124
5 40241088
6 5904797049
7 592030140912
8 47871255785661
9 3399596932632516
10 222507204130403730
11 13816730633213564154
12 828855022115369147634
13 48598186867956968680368
14 2806334420165022553155783
15 160409202733612103932779012
16 9106532681255976991378628043

List of values

[0, 0, 54, 128124, 40241088, 5904797049, 592030140912, 47871255785661, 3399596932632516, 222507204130403730, 13816730633213564154, 828855022115369147634, 48598186867956968680368, 2806334420165022553155783, 160409202733612103932779012, 9106532681255976991378628043]

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

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