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A192499 Half the number of nXnXn triangular binary arrays with every element unequal to at most 3 neighbors 0
1, 4, 26, 196, 2092, 28686, 534806, 13182070, 433981798, 19015675154, 1110527815484, 86390598478646, 8953005948663932, 1236137340970342866, 227372493923183802446 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..15.
EXAMPLE
Some solutions for 5X5X5 with a(1,1)=0
......0..........0..........0..........0..........0..........0..........0
.....1.1........0.0........1.1........0.0........1.1........0.1........1.0
....1.1.0......1.1.0......1.1.1......1.0.1......0.0.0......1.0.1......1.1.1
...0.0.0.0....1.1.1.0....0.1.1.1....1.0.0.1....0.0.0.1....1.0.0.0....0.0.1.0
..0.0.0.0.1..0.0.1.1.1..0.0.0.0.0..0.0.0.1.0..0.1.1.1.0..1.0.0.0.0..0.0.0.1.0
CROSSREFS
Sequence in context: A198024 A278393 A349361 * A271935 A246509 A369107
Adjacent sequences: A192496 A192497 A192498 * A192500 A192501 A192502
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 02 2011
STATUS
approved

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Last modified August 30 15:13 EDT 2024. Contains 375545 sequences. (Running on oeis4.)