A316442 - OEIS

%I #6 May 21 2021 15:43:25

%S 0,7,57,946,43568,3624515,621643922,235652502418,182371905958510

%N Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A316448.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316448.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 03 2018