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.

A268767 Number of n X n 0..2 arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 12
3 112
4 2296
5 64112
6 3104544
7 255353744
8 36091542548
9 8990276037592
10 3911658481295924
11 3022669494445395808
12 4128305052223833006600
13 10045914708457218016317000
14 43496963453603913793217952196

List of values

[0, 12, 112, 2296, 64112, 3104544, 255353744, 36091542548, 8990276037592, 3911658481295924, 3022669494445395808, 4128305052223833006600, 10045914708457218016317000, 43496963453603913793217952196]

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

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