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A195799 Number of triangular nXnXn 0..2 arrays with all rows and diagonals having the same length having the same sum, with corners zero 0
1, 1, 3, 27, 105, 1695, 284427, 11606931 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A195805

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=5

......0..........0..........0..........0..........0..........0..........0

.....1.0........1.0........1.1........1.2........0.0........1.2........2.0

....1.0.1......2.0.2......2.2.2......0.1.0......2.0.2......0.1.0......1.1.1

...0.0.0.1....0.0.0.1....1.2.2.1....2.1.1.1....0.0.0.0....2.1.1.1....0.1.1.2

..0.1.1.0.0..0.1.2.0.0..0.1.2.1.0..0.1.0.2.0..0.0.2.0.0..0.1.0.2.0..0.2.1.0.0

CROSSREFS

Sequence in context: A302525 A303407 A173491 * A297662 A127210 A161807

Adjacent sequences:  A195796 A195797 A195798 * A195800 A195801 A195802

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 23 2011

STATUS

approved

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Last modified September 23 09:03 EDT 2020. Contains 337298 sequences. (Running on oeis4.)