A305912 - OEIS

%I #4 Jun 14 2018 07:03:54

%S 1,5,13,101,2014,61467,18643274,12581159370,17019760656259

%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Diagonal of A305918.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305918.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 14 2018