A163880 - OEIS

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A163880

Number of nXnXn triangular binary arrays with all 1s connected, and all vertexes 1

0

1, 1, 4, 37, 730, 29864, 2491566, 419695572, 141865760710, 95854674462202

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

All solutions for n=3

....1......1......1......1..

...1.1....1.1....1.0....0.1.

..1.0.1..1.1.1..1.1.1..1.1.1

CROSSREFS

Sequence in context: A352469 A061683 A084283 * A183509 A220245 A371441

Adjacent sequences: A163877 A163878 A163879 * A163881 A163882 A163883

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 06 2009

STATUS

approved