|
%I #4 Mar 31 2012 12:36:21
%S 7,216,2214,100182,12248028,3441628488,2541579263184,4630582277026170
%N Number of nXnXn triangular 0..6 arrays with no element equal to the sum or difference mod 7 of any two of its neighbors
%e Some solutions for 4X4X4
%e .....4........2........1........4........4........2........3........1
%e ....1.1......2.2......1.4......1.1......4.1......2.3......3.2......4.4
%e ...1.4.1....3.3.3....1.4.1....1.1.1....4.4.1....3.3.2....3.3.2....1.1.4
%e ..1.4.1.4..3.3.3.3..4.4.4.4..4.1.1.1..4.4.4.1..2.3.3.3..2.3.2.2..1.1.4.4
%K nonn
%O 1,1
%A _R. H. Hardin_ Aug 06 2011
| 