A305527 - OEIS

%I #4 Jun 04 2018 12:03:36

%S 16,420,4779,61139,767417,9599897,120736482,1516911265,19047231319,

%T 239296544073,3006001064287,37759220717254,474325856668925,

%U 5958345162521726,74846763031519350,940204050723933820

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

%C Column 5 of A305530.

%H R. H. Hardin, <a href="/A305527/b305527.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..0..0. .0..0..0..0..1. .0..0..0..0..0

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

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

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

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

%Y Cf. A305530.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 04 2018