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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.

A229408 Number of nX4 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

Table of values

n a(n)
1 216
2 18712
3 1629298
4 142475606
5 12462062342
6 1088122273732
7 95053083585891
8 8301763765531574
9 725093556456021346
10 63329941366726648700
11 5531290909649734783556
12 483106534141329972723097

List of values

[216, 18712, 1629298, 142475606, 12462062342, 1088122273732, 95053083585891, 8301763765531574, 725093556456021346, 63329941366726648700, 5531290909649734783556, 483106534141329972723097]

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

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