The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #6 May 03 2020 15:44:39
%S 0,1,1,4,10,62,624,95458,6564438,7857314649
%N Number of n X n 0..1 arrays with every element equal to 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298167.
%e Some solutions for n=7
%e ..0..0..0..0..0..1..1. .0..0..0..1..1..1..1. .0..0..0..0..0..1..1
%e ..0..0..1..0..0..1..1. .0..0..0..1..1..1..1. .0..0..1..0..0..1..1
%e ..0..1..1..1..0..1..1. .0..0..0..1..1..1..1. .0..1..1..1..0..1..1
%e ..0..0..1..1..1..0..0. .1..1..1..0..0..0..0. .0..0..1..1..0..1..1
%e ..0..0..0..0..1..0..0. .1..1..1..0..0..0..0. .0..0..1..0..0..0..1
%e ..1..1..1..0..0..1..1. .0..0..0..1..1..1..1. .0..0..1..1..0..1..1
%e ..1..1..1..0..0..1..1. .0..0..0..1..1..1..1. .0..0..1..1..1..1..1
%Y Cf. A298167.
%K nonn
%O 1,4
%A _R. H. Hardin_, Jan 14 2018