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A301401 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #7 Apr 20 2020 00:00:05

%S 1,8,252,31012,14905344,27990353344,205353183605152,

%T 5886041167193603328,659134453175183361984192,

%U 288372301975051917749449831520,492903495313227230995120900845724672

%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A301407.

%H R. H. Hardin, <a href="/A301401/b301401.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=5

%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

%e ..0..0..0..1..1. .0..0..0..0..1. .0..0..0..1..1. .0..0..0..0..1

%e ..1..1..0..0..0. .0..1..1..0..1. .0..1..1..1..1. .1..1..0..1..1

%e ..1..0..0..0..1. .0..0..1..1..1. .0..1..1..0..1. .0..1..0..0..1

%e ..0..1..0..0..0. .1..0..1..0..1. .1..1..1..0..0. .0..1..0..1..1

%Y Cf. A301407.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 20 2018

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Last modified July 22 00:58 EDT 2024. Contains 374478 sequences. (Running on oeis4.)