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Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1's.
0

%I #6 May 03 2020 15:36:42

%S 1,5,66,852,34159,6379211,2703029494,2266768029479,5448033721050367

%N Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1's.

%C Diagonal of A297749.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A297749.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 05 2018