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.

A269029 Number of n X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 24
3 348
4 18384
5 1326576
6 208867428
7 63310818360
8 40013955378312
9 51911512873697772
10 140039775591497709312
11 791864652110724378938904
12 9334169232033820587188999592
13 232675011644185023762453520339476

List of values

[0, 24, 348, 18384, 1326576, 208867428, 63310818360, 40013955378312, 51911512873697772, 140039775591497709312, 791864652110724378938904, 9334169232033820587188999592, 232675011644185023762453520339476]

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

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