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.

A151657 Number of permutations of 7 indistinguishable copies of 1..n with exactly 3 adjacent element pairs in decreasing order.

Table of values

n a(n)
1 0
2 1225
3 818300
4 160310458
5 22727054364
6 2892619063243
7 354402440786800
8 42837393111682484
9 5153280785356119360
10 618914057659003904189
11 74290570601695876667092
12 8915697686087571194412590
13 1069916360274028756641650036
14 128391238501628502906890984271

List of values

[0, 1225, 818300, 160310458, 22727054364, 2892619063243, 354402440786800, 42837393111682484, 5153280785356119360, 618914057659003904189, 74290570601695876667092, 8915697686087571194412590, 1069916360274028756641650036, 128391238501628502906890984271]

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

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