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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
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: A344418 A159595 A009300 * A304670 A316117 A149477
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 29 2011
STATUS
approved

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Last modified June 21 05:50 EDT 2024. Contains 373540 sequences. (Running on oeis4.)