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A297513 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1's. 0

%I

%S 1,5,49,624,19187,1995817,424461759,156485261895,131486609293366,

%T 286750273002748274,1339067174781497822377

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

%C Diagonal of A297519.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A297519.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 31 2017

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Last modified January 26 13:18 EST 2021. Contains 340439 sequences. (Running on oeis4.)