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Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0

`%I #6 Sep 16 2020 19:03:11
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`%S 1,8,31,297,5613,218980,11901719,1341217380,375045359077,
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`%T 204902495620748,208094348433251495
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`%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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`%C Diagonal of A303182.
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`%e Some solutions for n=5
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`%e ..0..1..0..1..0. .0..0..1..0..1. .0..1..0..1..1. .0..0..1..0..1
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`%e ..0..1..0..1..0. .0..1..1..0..1. .0..1..0..1..0. .1..1..1..1..0
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`%e ..0..1..0..1..0. .0..1..0..0..1. .0..1..0..1..0. .1..0..1..0..1
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`%e ..0..1..0..0..1. .1..1..0..1..1. .0..1..1..1..0. .1..0..1..0..0
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`%e ..0..1..0..1..0. .1..0..0..1..0. .1..0..0..1..1. .1..0..1..1..0
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`%Y Cf. A303182.
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`%K nonn
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`%O 1,2
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`%A _R. H. Hardin_, Apr 19 2018
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