A316121 - OEIS

%I #4 Jun 24 2018 16:35:06

%S 1,49,144,702,5426,43480,283238,2064800,15977233,116608607,858256097,

%T 6440073113,47877563340,355152715761,2646475707180,19706024586437,

%U 146557771466279,1090878142968706,8120995743454821,60436020674609822

%N Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Column 6 of A316123.

%H R. H. Hardin, <a href="/A316121/b316121.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316123.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 24 2018