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A270253
Number of nXnXn triangular 0..4 arrays with some element plus some adjacent element totalling 4 exactly once.
0
0, 48, 4428, 772056, 308256072, 302595682944, 754152642763392, 4862374937595546552, 82021185773371226061000, 3647082581376581705719431936, 429702824583695959664255858960088
OFFSET
1,2
COMMENTS
Column 4 of A270256.
EXAMPLE
Some solutions for n=3
....4......2......1......0......2......3......0......2......2......4......3
...4.1....3.2....2.0....0.1....4.2....1.0....1.1....4.1....0.2....1.0....4.2
..2.3.2..3.4.3..2.1.2..4.2.4..1.4.1..0.1.2..4.2.2..1.0.2..2.3.0..0.1.0..4.2.0
CROSSREFS
Cf. A270256.
Sequence in context: A053060 A004034 A134164 * A098209 A208793 A174755
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 14 2016
STATUS
approved