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A316509 Number of nX6 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jul 05 2018 07:05:09

%S 0,209,3680,172574,7009503,295326468,12391266721,520715439686,

%T 21881306495563,919547925683781,38643892498510212,1624012821148500317,

%U 68249349054519078882,2868189202630357397577,120536098041003950386971

%N Number of nX6 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Column 6 of A316511.

%H R. H. Hardin, <a href="/A316509/b316509.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316511.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 05 2018

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)