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.

A268802 Number of n X n 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

Table of values

n a(n)
1 3
2 34
3 332
4 5848
5 195384
6 12432856
7 1508087180
8 348686105792
9 154172619407288
10 130573457756588328
11 212323461305457440492
12 663970589813116610557692
13 3999438097971983178736358520
14 46462227980008803491191644654968

List of values

[3, 34, 332, 5848, 195384, 12432856, 1508087180, 348686105792, 154172619407288, 130573457756588328, 212323461305457440492, 663970589813116610557692, 3999438097971983178736358520, 46462227980008803491191644654968]

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

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