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 A278004 Number of nX6 0..2 arrays with every element plus 1 mod 3 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. 1

%I #4 Nov 08 2016 08:36:58

%S 0,17424,6031565,2732579072,1224179323009,547419319384315,

%T 244860735613038021,109526799967682916321,48991344815015478999061,

%U 21913838295037396913177114,9802065277825607208801712389

%N Number of nX6 0..2 arrays with every element plus 1 mod 3 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 A278006.

%H R. H. Hardin, <a href="/A278004/b278004.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=2

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

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

%Y Cf. A278006.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 08 2016

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Last modified December 4 14:29 EST 2023. Contains 367563 sequences. (Running on oeis4.)