A192485 - OEIS

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A192485

Half the number of nXnXn triangular binary arrays with every element equal to at most 3 neighbors

1, 4, 28, 312, 5496, 158444, 7386598, 558062828, 68366493762, 13583953615958, 4377011029211530, 2287186005680108048, 1938220889714632813912, 2663689661329760406050654

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for 6X6X6 with a(1,1)=0

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

......0.0..........0.0..........0.0..........0.1..........0.0..........0.1

.....0.1.0........1.0.1........1.1.1........1.1.1........1.0.1........0.1.1

....1.0.1.1......1.0.1.0......0.1.0.1......0.0.0.0......0.0.1.0......1.0.1.0

...1.1.0.0.1....1.1.0.1.1....1.0.0.1.0....1.0.1.1.0....1.0.1.1.1....0.0.1.0.1

..0.0.1.1.0.0..0.0.0.0.1.0..0.1.1.1.0.0..1.0.1.1.0.1..1.1.1.0.0.1..0.1.1.0.0.0

CROSSREFS

Sequence in context: A177554 A316212 A337592 * A332097 A358072 A198513

Adjacent sequences: A192482 A192483 A192484 * A192486 A192487 A192488

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 02 2011

STATUS

approved