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.

A269102 Number of n X n 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 4
2 180
3 40908
4 43964700
5 232068730044
6 6206909793496236
7 858502190008810133292
8 622342168717398556687064028
9 2386083493285894017930101786679468

List of values

[4, 180, 40908, 43964700, 232068730044, 6206909793496236, 858502190008810133292, 622342168717398556687064028, 2386083493285894017930101786679468]

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

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