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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..8.

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

Adjacent sequences:  A164741 A164742 A164743 * A164745 A164746 A164747

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 24 2009

STATUS

approved

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Last modified May 25 02:01 EDT 2020. Contains 334581 sequences. (Running on oeis4.)