A305767 - OEIS

%I #4 Jun 10 2018 09:33:51

%S 32,1576,15874,240701,3343997,47791549,686168124,9812796379,

%T 140721354959,2015731961192,28883610743616,413862103479629,

%U 5929890697010320,84967009587871763,1217440538231235326,17444057654131554627

%N Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.

%C Column 6 of A305769.

%H R. H. Hardin, <a href="/A305767/b305767.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305769.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 10 2018