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A192372 Half the number of nXnXn triangular binary arrays with every element equal to at least half of its neighbors 0
1, 1, 4, 13, 56, 332, 2859, 32670, 502898, 10413631, 288505532, 10693831039, 529613478763, 35014302519080, 3088276953893989, 363246920564138364 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Some solutions for 9X9X9 with a(1,1)=0 and 22 1's

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

.........1.0................0.0................0.0................1.0

........1.1.0..............1.1.1..............0.0.0..............1.1.0

.......1.1.0.0............1.1.1.1............0.0.1.1............1.1.1.0

......1.1.0.0.0..........0.1.1.1.0..........0.0.1.1.1..........1.1.1.0.0

.....1.1.0.0.1.1........0.0.1.1.0.0........0.0.1.1.1.1........1.1.1.0.0.0

....1.1.1.0.1.1.1......0.0.0.0.0.0.0......0.0.0.1.1.1.1......0.0.1.1.0.0.0

...0.1.1.0.0.1.1.0....0.0.0.0.0.1.1.0....0.0.0.1.1.1.0.0....0.0.0.1.1.1.1.0

..0.0.0.0.0.0.1.0.0..1.1.1.1.1.1.1.1.0..1.1.1.1.1.1.0.0.0..0.0.0.0.1.1.1.1.0

CROSSREFS

Sequence in context: A243549 A159595 A009300 * A304670 A316117 A149477

Adjacent sequences:  A192369 A192370 A192371 * A192373 A192374 A192375

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 29 2011

STATUS

approved

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Last modified November 15 13:20 EST 2019. Contains 329149 sequences. (Running on oeis4.)