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%I #6 Mar 09 2023 17:37:35
%S 6,161,6960,686499,181876477,131680333106,290536092154255
%N Number of n X n X n triangular 0..5 arrays with no element equal to the product mod 6 of any two neighbors.
%e Some solutions for 4 X 4 X 4
%e .....0........0........0........0........0........0........0........0
%e ....1.4......4.1......5.4......5.3......3.1......2.5......1.1......1.1
%e ...3.1.2....0.5.3....0.4.5....3.4.5....2.5.2....2.0.2....0.3.5....2.0.2
%e ..2.4.0.1..1.1.2.1..1.5.0.1..5.4.3.4..2.2.3.1..5.2.2.2..1.1.4.0..1.5.1.0
%K nonn
%O 1,1
%A _R. H. Hardin_, Jul 24 2011
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