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Number of nX7 0..2 arrays with no element equal to any value at offset (-1,-1) (-2,0) or (0,-2) and new values introduced in order 0..2.
1

%I #4 Jul 12 2016 08:05:21

%S 48,1944,29370,536406,9902040,183551766,3403449396,63272648886,

%T 1177544081274,21902996126304,407411914385880,7579730569124166,

%U 141023976164929368,2623681154691815424,48812099869891553724

%N Number of nX7 0..2 arrays with no element equal to any value at offset (-1,-1) (-2,0) or (0,-2) and new values introduced in order 0..2.

%C Column 7 of A274959.

%H R. H. Hardin, <a href="/A274958/b274958.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A274959.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 12 2016