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A166200 Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 5 0
1, 6, 2, 5, 39, 122, 604, 8064, 40848, 495985, 16474555, 153952919, 4118194905, 283350411160, 6779925069586, 398461742491565, 59492448257857640 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

EXAMPLE

Some solutions for n=4

.....1........1........2........0........0........1........0........2...

....1.0......0.1......0.0......1.0......0.0......0.0......0.0......1.0..

...0.1.1....1.1.0....0.0.0....0.0.1....0.3.0....0.1.0....0.0.0....0.1.1.

..1.1.0.1..1.0.1.1..2.0.0.2..0.1.0.0..0.0.0.0..1.0.0.1..0.0.0.0..2.1.0.2

------

.....2........0........3........0........0........2........2........1...

....0.0......0.1......0.0......0.0......0.0......0.1......0.0......1.0..

...0.2.0....1.2.0....0.0.0....0.1.0....0.5.0....1.0.0....0.3.0....0.0.1.

..2.0.0.2..0.0.1.0..3.0.0.3..0.0.0.0..0.0.0.0..2.0.1.2..2.0.0.2..1.1.0.1

CROSSREFS

Sequence in context: A011489 A093601 A193780 * A120832 A021988 A021619

Adjacent sequences:  A166197 A166198 A166199 * A166201 A166202 A166203

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Oct 09 2009

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Last modified February 17 03:45 EST 2012. Contains 205978 sequences.