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A164744
Number of nXnXn triangular 1..3 arrays with all 1s connected, all 2s connected, all 3s connected, 1 at the top vertex, 2 at the lower left, and 3 at the lower right
0
1, 17, 174, 2084, 35489, 950448, 42560032
OFFSET
2,2
EXAMPLE
All solutions for n=3
.....1........1........1........1........1........1........1........1...
....2.1......1.1......2.3......1.3......2.1......1.1......2.3......1.3..
...2.2.3....2.2.3....2.2.3....2.2.3....2.3.3....2.3.3....2.3.3....2.3.3.
------
.....1........1........1........1........1........1........1........1...
....2.2......2.2......1.1......1.3......2.1......3.3......3.3......1.2..
...2.2.3....2.3.3....2.1.3....2.1.3....2.1.3....2.2.3....2.3.3....2.2.3.
------
.....1...
....3.1..
...2.3.3.
CROSSREFS
Sequence in context: A299331 A173647 A119343 * A228214 A246058 A121793
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 24 2009
STATUS
approved