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Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
0

%I #6 May 23 2020 04:37:32

%S 1,1,11,7,214,10681,610525,240137045,176490627544,423872214348626

%N Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Diagonal of A298444.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298444.

%K nonn

%O 1,3

%A _R. H. Hardin_, Jan 19 2018