A305646 - OEIS

%I #4 Jun 07 2018 09:07:51

%S 8,57,79,574,5547,31079,304707,3821570,37230262,388189669,4449595170,

%T 48262760771,521200625130,5779813369002,63596590407636,

%U 696061137670578,7663456805291520,84355346903004403,926775618019247726

%N Number of nX5 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Column 5 of A305649.

%H R. H. Hardin, <a href="/A305646/b305646.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305649.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 07 2018