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.

A268880 Number of n X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 5
3 84
4 4133
5 317966
6 55491832
7 19876401224
8 15564645769042
9 26617222097087230
10 99905925686618815012
11 832547140418699137884096
12 15355865014207234684746438192
13 632296902429868672596327438625296

List of values

[0, 5, 84, 4133, 317966, 55491832, 19876401224, 15564645769042, 26617222097087230, 99905925686618815012, 832547140418699137884096, 15355865014207234684746438192, 632296902429868672596327438625296]

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

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