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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.

A263793 Number of (n+1) X (n+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nonincreasing.

Table of values

n a(n)
1 2
2 2
3 7
4 7
5 61
6 616
7 62904
8 20141827

List of values

[2, 2, 7, 7, 61, 616, 62904, 20141827]

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

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