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.

A216796 Number of permutations of an n X 4 array with each element moving exactly one horizontally or vertically and without 2-loops.

Table of values

n a(n)
1 0
2 6
3 8
4 88
5 292
6 1774
7 7676
8 39844
9 186996
10 927134
11 4460016
12 21812696
13 105716132
14 514912230
15 2501152692
16 12167375908
17 59142175940
18 287602784246
19 1398239939960
20 6798750327544
21 33055539575012
22 160722650037822
23 781448253270316

List of values

[0, 6, 8, 88, 292, 1774, 7676, 39844, 186996, 927134, 4460016, 21812696, 105716132, 514912230, 2501152692, 12167375908, 59142175940, 287602784246, 1398239939960, 6798750327544, 33055539575012, 160722650037822, 781448253270316]

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

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