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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.

A240274 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 7
2 36
3 582
4 8265
5 126286
6 2059061
7 34514871
8 591083808
9 10257888481
10 179492029479
11 3156570684216
12 55683928149753
13 984159273442563
14 17414013354270353
15 308343982790239450
16 5462057581927992592

List of values

[7, 36, 582, 8265, 126286, 2059061, 34514871, 591083808, 10257888481, 179492029479, 3156570684216, 55683928149753, 984159273442563, 17414013354270353, 308343982790239450, 5462057581927992592]

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

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