|
%I #6 Jun 15 2020 11:24:37
%S 1,5,5,34,336,4001,76983,2232433,92349689,5607760208
%N Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298727.
%e Some solutions for n=5
%e ..0..1..0..1..1. .0..0..1..1..1. .0..0..0..0..0. .0..1..0..1..0
%e ..0..0..0..0..1. .0..1..0..1..0. .0..0..0..0..0. .1..1..1..1..1
%e ..0..1..1..1..0. .1..1..0..1..1. .0..0..0..0..0. .1..0..1..0..1
%e ..1..0..0..0..1. .0..1..0..1..0. .1..1..1..1..1. .0..0..0..0..0
%e ..1..1..0..1..1. .0..0..1..0..0. .1..1..1..1..1. .0..1..0..1..0
%Y Cf. A298727.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 25 2018
| 