A296723 - OEIS

%I #4 Dec 19 2017 13:16:35

%S 21,393,3493,44668,579857,6829945,84312938,1042553987,12735280455,

%T 156519553289,1923876392648,23611929410157,290021887978541,

%U 3562298803824671,43747148405059017,537296584934686222

%N Number of nX6 0..1 arrays with each 1 adjacent to 0, 2 or 4 king-move neighboring 1s.

%C Column 6 of A296725.

%H R. H. Hardin, <a href="/A296723/b296723.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A296725.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 19 2017