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A271514
Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal and exactly one upright 2x2x2 triangle having values all different.
0
0, 0, 12, 1440, 207360, 46448640, 17836277760, 12328435187712, 15780397040271360, 38089369770346414080, 175515815901756276080640, 1557644360856119698123653120, 26796467468679998390760829353984
OFFSET
1,3
COMMENTS
Column 2 of A271517.
EXAMPLE
Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......1.2......1.1......1.0......0.0......1.0......1.0......0.1
...0.0.0....2.2.2....1.1.0....2.0.0....0.1.1....1.1.1....1.1.2....1.2.1
..1.2.0.2..0.0.2.1..2.0.1.0..2.0.2.0..1.1.0.2..0.2.2.2..2.2.1.1..2.2.2.2
CROSSREFS
Cf. A271517.
Sequence in context: A145835 A008992 A260448 * A181856 A161149 A160490
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 09 2016
STATUS
approved