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A270254
Number of nXnXn triangular 0..5 arrays with some element plus some adjacent element totalling 5 exactly once.
0
0, 72, 14976, 7876728, 12712991544, 67475902622400, 1217128601064427992, 75996953900646817459320, 16613624242885262049626796576
OFFSET
1,2
COMMENTS
Column 5 of A270256.
EXAMPLE
Some solutions for n=3
....1......5......4......3......2......3......0......1......5......1......1
...0.2....5.4....4.4....0.4....3.5....5.4....4.0....5.0....0.1....2.1....0.1
..1.3.5..5.1.5..0.5.2..2.3.4..1.5.5..3.0.2..4.5.1..4.3.4..1.2.0..1.2.3..1.5.2
CROSSREFS
Cf. A270256.
Sequence in context: A289369 A048544 A295599 * A273629 A373650 A243234
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 14 2016
STATUS
approved