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A298623 Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0

%I

%S 0,1,8,125,20959,7087666,9557110072,42384213387355,621075964119527775

%N Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Diagonal of A298629.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298629.

%K nonn

%O 1,3

%A _R. H. Hardin_, Jan 23 2018

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Last modified May 28 18:24 EDT 2022. Contains 354122 sequences. (Running on oeis4.)