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Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1

%I #4 Apr 03 2018 12:15:08

%S 5,537,3425,38736,338204,3420704,32181643,310963650,2973099477,

%T 28539661221,273649285789,2623829240629,25163515492994,

%U 241281374262345,2313955414338689,22188973218594562,212790004250803955

%N Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 6 of A302224.

%H R. H. Hardin, <a href="/A302222/b302222.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A302224.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 03 2018