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A164745 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, and no value having more than 3 identical values adjacent 0
1, 17, 105, 570, 3634, 30894, 360936 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
EXAMPLE
Some solutions for n=4
......1..........1..........1..........1..........1..........1..........1....
.....2.1........1.3........2.2........1.3........1.1........3.3........1.1...
....2.1.1......1.1.3......2.3.2......3.1.3......3.3.3......3.2.3......2.2.3..
...2.1.3.3....2.3.3.3....2.3.3.3....2.3.3.3....2.2.3.3....2.2.2.3....2.2.3.3.
------
......1..........1..........1..........1..........1..........1..........1....
.....3.1........1.1........2.2........3.1........3.1........1.2........2.1...
....3.1.3......2.2.1......2.3.3......3.1.1......3.3.3......2.2.3......2.2.1..
...2.3.3.3....2.3.3.3....2.2.2.3....2.3.3.3....2.2.2.3....2.2.3.3....2.1.1.3.
CROSSREFS
Sequence in context: A095785 A194131 A194475 * A221938 A121823 A268263
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 24 2009
STATUS
approved

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Last modified March 28 08:19 EDT 2024. Contains 371236 sequences. (Running on oeis4.)