A193876 Number of nXnXn triangular 0..5 arrays with no element equal to the difference mod 6 of any two of its neighbors

6, 140, 1491, 76963, 16751585, 11834053301, 25738138641745, 168951662233420567, 3330793392617908082489

Offset

1,1

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for 4X4X4
.....2........4........4........2........3........4........1........4
....3.2......4.4......1.1......4.4......1.1......4.4......1.4......4.1
...2.3.2....1.4.4....1.1.1....4.4.4....1.3.1....4.4.4....1.1.1....1.4.1
..2.3.3.2..1.1.4.1..1.4.4.1..2.4.2.4..3.1.1.3..1.1.1.1..4.1.1.1..4.1.4.4

Crossrefs

Sequence in context: A123729 A193835 A123728 * A293124 A193185 A359647

Adjacent sequences: A193873 A193874 A193875 * A193877 A193878 A193879

Keyword

nonn

Author

R. H. Hardin Aug 07 2011

Status

approved