A298925 - OEIS

%I #6 Jun 15 2020 14:00:56

%S 0,1,1,11,94,955,15163,491338,19329083,1185260593

%N Number of n X n 0..1 arrays with every element equal to 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A298930.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298930.

%K nonn

%O 1,4

%A _R. H. Hardin_, Jan 29 2018