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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.

A205816 Number of (n+1) X (n+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases.

Table of values

n a(n)
1 24
2 216
3 2880
4 67944
5 2791080
6 206195280
7 27196042704
8 6437088838008
9 2723887997403024
10 2064821553536444652
11 2798458452635665138464

List of values

[24, 216, 2880, 67944, 2791080, 206195280, 27196042704, 6437088838008, 2723887997403024, 2064821553536444652, 2798458452635665138464]

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

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