A317147 - OEIS

%I #4 Jul 22 2018 15:43:49

%S 1,4,36,416,19580,960577,100639070,24402104731,9305062491337

%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A317153.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317153.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 22 2018