A193371 Number of nXnXn triangular 0..6 arrays with no element equal to the product mod 7 of any two neighbors

7, 248, 16614, 3067075, 1661756176, 3158137118246

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 4X4X4
.....0........0........0........0........0........0........0........0
....3.5......3.1......3.5......3.3......3.3......3.1......3.1......3.5
...5.3.5....6.0.2....3.6.5....3.6.6....3.3.3....5.6.0....6.0.2....5.6.6
..5.6.6.6..5.1.1.3..3.3.5.5..2.0.3.5..4.4.4.4..0.1.1.4..0.3.1.3..3.5.0.2

Crossrefs

Sequence in context: A227414 A203698 A229482 * A347843 A338633 A142805

Adjacent sequences: A193368 A193369 A193370 * A193372 A193373 A193374

Keyword

nonn

Author

R. H. Hardin Jul 24 2011

Status

approved