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A195797 Number of triangular nXnXn 0..n arrays with all rows and diagonals having the same length having the same sum, with corners zero 1
1, 1, 4, 125, 5052, 5828215, 479534519840 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A195805

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=5

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

.....0.1........5.0........5.0........4.3........5.0........1.0........3.2

....4.4.3......5.0.5......3.0.5......4.0.3......3.0.4......3.1.3......5.1.5

...1.2.3.1....0.0.0.5....0.4.2.3....2.1.2.4....0.2.1.4....0.1.1.1....1.4.4.2

..0.0.5.0.0..0.5.5.0.0..0.5.1.2.0..0.5.2.3.0..0.5.2.1.0..0.1.3.0.0..0.4.2.3.0

CROSSREFS

Sequence in context: A209040 A068891 A073351 * A068894 A116944 A124260

Adjacent sequences:  A195794 A195795 A195796 * A195798 A195799 A195800

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 23 2011

STATUS

approved

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Last modified December 4 13:19 EST 2016. Contains 278750 sequences.