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A192501 Half the number of nXnXn triangular binary arrays with every element unequal to at most 5 neighbors 1
1, 4, 32, 504, 15616, 952568, 114398784, 27047931336, 12590229670016, 11537734147704408, 20815875785566075392, 73936029515317194754512, 517017017731619538916703104, 7117718842091581424421976838888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for 5X5X5 with a(1,1)=0

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

.....0.0........0.1........0.0........1.1........1.1........0.0........0.1

....1.0.1......1.1.1......1.0.1......1.1.1......0.0.1......0.0.0......0.1.1

...1.0.1.0....0.0.1.0....0.0.1.1....1.0.1.0....1.1.1.0....0.0.1.1....1.0.0.1

..1.1.1.1.0..1.0.1.1.1..0.1.1.0.0..1.0.0.0.1..0.1.0.1.1..1.1.1.0.0..1.1.0.1.0

CROSSREFS

Sequence in context: A209197 A086906 A034663 * A192487 A093581 A102557

Adjacent sequences:  A192498 A192499 A192500 * A192502 A192503 A192504

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 02 2011

STATUS

approved

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Last modified October 20 05:51 EDT 2020. Contains 337897 sequences. (Running on oeis4.)