Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #4 Jul 26 2018 16:47:47
%S 0,7,91,4811,659721,205048072,185409601420,451074475284615,
%T 2822674184876891727
%N Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A317376.
%e Some solutions for n=5
%e ..0..0..0..0..1. .0..0..0..1..0. .0..0..0..1..1. .0..0..0..0..0
%e ..1..1..0..0..0. .1..0..0..0..1. .0..1..0..0..0. .1..0..0..1..0
%e ..0..0..0..1..1. .1..1..0..0..1. .1..1..0..0..0. .1..0..0..0..1
%e ..1..1..0..0..0. .0..0..0..1..1. .1..1..0..1..0. .0..1..0..0..1
%e ..0..1..0..0..1. .1..0..1..0..1. .0..1..1..1..0. .0..1..0..1..0
%Y Cf. A317376.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jul 26 2018