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A183280 Half the number of nXnXn triangular binary arrays with no element having four consecutive neighbors taken clockwise with equal values 0
1, 4, 22, 134, 868, 6052, 46848, 415306, 4322824, 53913412, 818822848, 15278575800, 351372976224, 9962126955988, 348066786734314, 14985977146717232, 795230927064186056, 52013690674597756472, 4193062390412799383812 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

EXAMPLE

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

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

......1.0..........0.0..........1.1..........1.0..........1.1..........0.1

.....0.1.1........1.1.1........1.0.0........1.0.1........0.0.1........0.1.1

....1.0.0.1......0.0.0.1......0.0.0.1......1.0.1.0......1.0.0.0......1.0.1.0

...0.1.0.0.0....1.1.0.0.1....0.0.1.1.1....0.1.0.1.0....1.1.1.1.1....1.1.0.1.0

..0.0.1.1.1.0..0.0.1.1.0.1..0.1.1.1.0.0..0.1.1.0.1.0..0.1.0.0.0.1..0.1.0.1.1.0

CROSSREFS

Sequence in context: A321275 A274745 A197657 * A183281 A067120 A143648

Adjacent sequences:  A183277 A183278 A183279 * A183281 A183282 A183283

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved

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Last modified June 17 14:09 EDT 2019. Contains 324185 sequences. (Running on oeis4.)