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A298649 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. 0

%I

%S 0,4,48,466,5124,75562,1277500,30337435,1060912744,50167771709,

%T 3415576723102,354153850821427

%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Diagonal of A298653.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298653.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 24 2018

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Last modified September 24 12:34 EDT 2022. Contains 356931 sequences. (Running on oeis4.)