A306140 - OEIS

%I #4 Jun 22 2018 07:55:02

%S 3,313,2787,40610,601535,8151029,114440831,1609075139,22447164273,

%T 314280482738,4398879870601,61537268595549,861131897150473,

%U 12049755639784951,168605788029197162,2359272015430288592

%N Number of nX5 0..1 arrays with every element unequal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Column 5 of A306143.

%H R. H. Hardin, <a href="/A306140/b306140.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A306143.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 22 2018