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.

A268791 Number of n X n 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 22
3 248
4 4800
5 168740
6 11138352
7 1384570516
8 325815151556
9 145913571668076
10 124768928833331732
11 204377241703937153076
12 642788798787566885184552
13 3889478620658657294120765368
14 45350632160719542617837369658508

List of values

[0, 22, 248, 4800, 168740, 11138352, 1384570516, 325815151556, 145913571668076, 124768928833331732, 204377241703937153076, 642788798787566885184552, 3889478620658657294120765368, 45350632160719542617837369658508]

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

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