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Number of nX6 0..3 arrays with every element plus 1 mod 4 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.
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%I #4 Nov 16 2016 07:07:41

%S 0,30475,44653299,58169902939,78878506284185,106937880786585233,

%T 144890411982622214715,196324396224795460823590,

%U 266017816110405604627304812,360451345655941579473611590523

%N Number of nX6 0..3 arrays with every element plus 1 mod 4 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.

%C Column 6 of A278272.

%H R. H. Hardin, <a href="/A278271/b278271.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=2

%e ..0..1..1..0..0..1. .0..3..1..0..3..1. .0..1..2..1..0..2. .0..0..3..3..2..0

%e ..0..2..3..3..2..1. .1..2..1..1..2..0. .2..3..1..3..3..1. .1..2..1..0..1..3

%Y Cf. A278272.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 16 2016