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A166177 Number of nXnXn triangular nonnegative integer arrays with all sums of an element and its neighbors <= 5 0
1, 6, 56, 524, 22824, 2020979, 302330869, 121282526769, 104290053592872 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..8.

EXAMPLE

Some solutions for n=4

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

....1.0......2.0......0.0......0.0......0.0......0.0......0.0......0.1..

...0.0.0....0.0.1....2.0.0....1.1.0....0.1.1....1.0.2....1.1.0....2.0.0.

..2.0.1.2..1.1.1.2..2.0.0.5..0.0.0.3..2.0.1.2..1.2.0.1..3.0.0.2..0.0.0.3

------

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

....0.0......0.1......1.2......2.0......0.0......0.0......0.2......0.0..

...2.0.2....0.0.1....0.0.1....2.0.0....0.3.0....0.0.0....1.0.0....0.0.2.

..0.0.0.1..1.0.0.1..0.0.1.1..1.0.1.3..1.0.0.2..3.0.0.0..1.1.1.0..0.2.0.0

CROSSREFS

Sequence in context: A277975 A155613 A183586 * A183615 A181589 A093142

Adjacent sequences:  A166174 A166175 A166176 * A166178 A166179 A166180

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 09 2009

STATUS

approved

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Last modified November 15 06:24 EST 2019. Contains 329144 sequences. (Running on oeis4.)