login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of nX6 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
1

%I #4 Jun 01 2018 11:03:26

%S 5,165,77,475,2697,5443,30344,132479,485885,2234246,10360930,46551286,

%T 215173161,1048177833,5066538127,24313912355,121177423087,

%U 601813215111,2963069376479,14909449140925,74812897752428,373436610864819

%N Number of nX6 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

%C Column 6 of A305452.

%H R. H. Hardin, <a href="/A305450/b305450.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305452.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 01 2018