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.

A318539 Number of n X n 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 1
3 6
4 31
5 247
6 2905
7 46165
8 1143583
9 41368803
10 2165406865
11 168220637918
12 19176703676628
13 3204799103321623
14 788247777299643666
15 284810105663632654341
16 151134158955831615046217

List of values

[1, 1, 6, 31, 247, 2905, 46165, 1143583, 41368803, 2165406865, 168220637918, 19176703676628, 3204799103321623, 788247777299643666, 284810105663632654341, 151134158955831615046217]

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

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