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A166181 Number of nXnXn triangular nonnegative integer arrays with all sums of an element and its neighbors <= 9 0
1, 10, 220, 6111, 1264026, 771160264, 1124902818525 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

EXAMPLE

Some solutions for n=4

.....1........2........0........1........0........5........1........6...

....3.0......2.2......1.2......1.2......2.0......1.0......2.0......0.0..

...1.0.1....2.0.1....3.2.0....0.0.0....0.2.1....1.0.3....1.1.0....0.0.0.

..1.0.1.0..4.0.0.0..3.0.1.0..7.1.1.0..5.0.1.0..0.0.1.0..1.0.0.0..0.1.0.1

------

.....2........1........0........0........0........0........4........1...

....2.1......4.0......1.1......0.0......0.1......1.0......2.0......0.2..

...3.0.2....0.1.3....2.0.2....2.0.0....2.1.3....0.5.1....2.0.0....0.0.3.

..1.1.0.0..4.0.0.0..5.1.1.0..5.1.0.0..0.1.0.0..2.1.0.0..3.0.1.0..9.0.0.0

CROSSREFS

Sequence in context: A024292 A094420 A053131 * A199748 A064333 A052789

Adjacent sequences:  A166178 A166179 A166180 * A166182 A166183 A166184

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 08:40 EST 2012. Contains 205998 sequences.