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.

A183771 1/32 the number of (n+1) X 9 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 2240
2 823680
3 346131968
4 153876579840
5 70577422755840
6 33021546171494400
7 15664518350357381120
8 7506428481300850827264
9 3625062729947846895239168
10 1761398107886979915147182080
11 860111024347049203759900262400

List of values

[2240, 823680, 346131968, 153876579840, 70577422755840, 33021546171494400, 15664518350357381120, 7506428481300850827264, 3625062729947846895239168, 1761398107886979915147182080, 860111024347049203759900262400]

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

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