|
%I #4 Aug 15 2018 13:16:54
%S 1,6,18,73,316,3029,46884,935951,38183961,2877277695,323244675173,
%T 63938089963412,22744080515948233,13243562482553493420
%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A318075.
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..1..1..1..0. .0..1..1..1..0. .0..0..0..0..0
%e ..0..1..1..0..0. .1..1..1..1..0. .1..1..1..0..0. .0..0..0..0..0
%e ..0..0..0..1..0. .1..1..1..1..0. .1..1..0..0..1. .0..0..0..0..0
%e ..0..0..0..1..0. .1..0..1..1..0. .1..0..0..1..1. .0..1..1..0..0
%e ..0..0..0..0..0. .0..1..1..1..0. .0..0..1..1..1. .0..0..0..0..1
%Y Cf. A318075.
%K nonn
%O 1,2
%A _R. H. Hardin_, Aug 15 2018
| 