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.

A206690 Number of nX6 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.

Table of values

n a(n)
1 8
2 376
3 2816
4 24492
5 213788
6 1915580
7 17277556
8 156946368
9 1429962032
10 13057140562
11 119353104128
12 1091748256156
13 9990044761998
14 91434371494388
15 836958605238016
16 7661779056726008
17 70141114109343664
18 642134221496445414

List of values

[8, 376, 2816, 24492, 213788, 1915580, 17277556, 156946368, 1429962032, 13057140562, 119353104128, 1091748256156, 9990044761998, 91434371494388, 836958605238016, 7661779056726008, 70141114109343664, 642134221496445414]

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

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