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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.

A183765 1/32 the number of (2n+1) X (2n+1) binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1.

Table of values

n a(n)
1 6
2 205920
3 2323234636800
4 7506428481300850827264
5 6612015156138094974390271820169216

List of values

[6, 205920, 2323234636800, 7506428481300850827264, 6612015156138094974390271820169216]

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

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