A299222 - OEIS

%I #6 Jun 15 2020 14:20:55

%S 0,4,113,5663,766094,281251424,260938102438,624662873923282,

%T 3865535525302817693

%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Diagonal of A299228.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A299228.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 05 2018