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A195800 Number of triangular nXnXn 0..3 arrays with all rows and diagonals having the same length having the same sum, with corners zero 0
1, 1, 4, 64, 496, 24928, 17528896, 3850960912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 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

.....3.3........1.0........2.0........2.2........1.0........0.1........2.0

....0.3.0......1.1.3......3.0.3......1.0.1......1.1.1......0.2.0......3.0.3

...3.3.3.3....1.2.0.0....0.0.0.2....2.0.0.2....0.1.1.1....1.2.2.0....0.0.0.2

..0.3.0.3.0..0.0.2.1.0..0.2.3.0.0..0.2.1.2.0..0.1.1.0.0..0.0.0.1.0..0.2.3.0.0

CROSSREFS

Sequence in context: A103751 A053959 A343725 * A224446 A128782 A353453

Adjacent sequences:  A195797 A195798 A195799 * A195801 A195802 A195803

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 23 2011

STATUS

approved

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Last modified July 1 07:25 EDT 2022. Contains 354952 sequences. (Running on oeis4.)