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A195798 Number of triangular nXnXn 0..1 arrays with all rows and diagonals having the same length having the same sum, with corners zero 1
1, 1, 2, 8, 16, 64, 1184, 5300, 130324, 14748808, 421963232, 54990266540 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 1 of A195805

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=5

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

.....1.1........1.1........1.1........1.1........0.0........1.1........0.0

....0.0.0......0.0.0......0.0.0......0.0.0......1.1.1......0.0.0......1.1.1

...1.0.0.1....1.0.0.1....1.0.0.1....1.0.0.1....0.1.1.0....1.0.0.1....0.1.1.0

..0.1.0.1.0..0.1.0.1.0..0.1.0.1.0..0.1.0.1.0..0.0.1.0.0..0.1.0.1.0..0.0.1.0.0

CROSSREFS

Sequence in context: A094014 A098232 A354275 * A100736 A099888 A249308

Adjacent sequences:  A195795 A195796 A195797 * A195799 A195800 A195801

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 23 2011

STATUS

approved

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Last modified May 28 22:08 EDT 2022. Contains 354122 sequences. (Running on oeis4.)