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.

A240463 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or three 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 28
2 476
3 8187
4 143237
5 2501883
6 43654661
7 761700369
8 13290291978
9 231879123545
10 4045526615228
11 70580191049583
12 1231367510496942
13 21482798448261309
14 374794402280678279
15 6538751854554181415
16 114076545131533814184

List of values

[28, 476, 8187, 143237, 2501883, 43654661, 761700369, 13290291978, 231879123545, 4045526615228, 70580191049583, 1231367510496942, 21482798448261309, 374794402280678279, 6538751854554181415, 114076545131533814184]

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

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