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.

A269208 Number of n X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

Table of values

n a(n)
1 0
2 96
3 18048
4 12548544
5 30541426560
6 292321215814512
7 11273191243423937904
8 1787171501783334054571344
9 1177416215650225851496983234096
10 3247635013385894059877839733594599296

List of values

[0, 96, 18048, 12548544, 30541426560, 292321215814512, 11273191243423937904, 1787171501783334054571344, 1177416215650225851496983234096, 3247635013385894059877839733594599296]

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

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