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.

A268141 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to at least one diagonal or antidiagonal neighbor and the top left element equal to 0.

Table of values

n a(n)
1 0
2 3
3 8
4 672
5 5760
6 1411560
7 25024320
8 11908517040
9 361147852800

List of values

[0, 3, 8, 672, 5760, 1411560, 25024320, 11908517040, 361147852800]

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

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