login
Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.
0

%I #4 Jul 07 2018 08:31:39

%S 0,7,63,2477,130212,15492767,4227286531,2151886485463,2515639556772307

%N Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A316583.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316583.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 07 2018