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A295090 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1's. 0

%I #6 Apr 26 2020 20:47:09

%S 1,5,33,578,21185,1767431,329926211,137994394960,129350877831211,

%T 271756998888328388,1279500367201581413204,13501456561909863649426230

%N Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1's.

%C Diagonal of A295097.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A295097.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 14 2017

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Last modified August 13 02:28 EDT 2024. Contains 375113 sequences. (Running on oeis4.)