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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.

A240459 Number of nX5 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 32
2 1583
3 65723
4 2501883
5 92193017
6 3337483054
7 119643524281
8 4265146133201
9 151546630250473
10 5374173813805185
11 190357922342008547
12 6737907461668482163
13 238393662801305197196
14 8432427442592587713280
15 298224063492597274075079

List of values

[32, 1583, 65723, 2501883, 92193017, 3337483054, 119643524281, 4265146133201, 151546630250473, 5374173813805185, 190357922342008547, 6737907461668482163, 238393662801305197196, 8432427442592587713280, 298224063492597274075079]

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

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