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Number of nXnXn triangular 0..7 arrays with no element equal to the sum mod 8 of any two neighbors
0

%I #4 Mar 31 2012 12:36:21

%S 8,364,24403,4239509,3061405317,9848613098653

%N Number of nXnXn triangular 0..7 arrays with no element equal to the sum mod 8 of any two neighbors

%e Some solutions for 4X4X4

%e .....2........4........6........4........6........2........2........4

%e ....4.4......2.4......6.2......2.4......4.4......2.6......4.4......4.4

%e ...4.4.4....4.4.7....6.6.5....4.4.4....4.1.1....6.2.1....6.4.3....4.7.7

%e ..7.6.5.2..4.4.4.2..7.6.6.6..5.6.3.3..6.4.7.4..2.7.6.6..4.3.3.5..2.4.4.4

%K nonn

%O 1,1

%A _R. H. Hardin_ Jul 17 2011