|
%I #6 Jun 15 2020 14:18:17
%S 0,4,129,11179,3426869,3643124959,13311860331263,167720233672628013,
%T 7285451454600766025388
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A299142.
%e Some solutions for n=5
%e ..0..0..0..0..1. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..1
%e ..0..0..1..1..0. .0..1..0..1..0. .0..0..0..0..0. .0..0..0..1..1
%e ..0..1..1..0..0. .1..0..0..1..0. .0..1..0..0..1. .1..0..0..0..1
%e ..1..1..1..0..1. .1..0..1..1..0. .0..1..1..0..1. .1..1..1..0..1
%e ..0..0..1..1..0. .1..1..0..0..1. .1..1..1..0..1. .1..1..0..1..0
%Y Cf. A299142.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 03 2018
| 