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.

A190830 Number of permutations of 4 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1.

Table of values

n a(n)
0 1
1 0
2 1
3 182
4 94376
5 98371884
6 182502973885
7 551248360550999
8 2536823683737613858
9 16904301142107043464659
10 156690501089429126239232946
11 1955972150994131850032960933480
12 32016987304767134806200915633253966
13 672058204939482014438623912695190927357

List of values

[1, 0, 1, 182, 94376, 98371884, 182502973885, 551248360550999, 2536823683737613858, 16904301142107043464659, 156690501089429126239232946, 1955972150994131850032960933480, 32016987304767134806200915633253966, 672058204939482014438623912695190927357]

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

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