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A183279 Half the number of nXnXn triangular binary arrays with no array-nonaligned 2X2X2 subtriangle being all zero or all one 1
1, 4, 24, 216, 2808, 51840, 1347192, 49029624, 2490765552, 176234338656, 17339959771992, 2369745054644616, 449436884224900104, 118209416642307619200, 43093920857777993195064 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..23

EXAMPLE

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

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

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

.....0.1.0........1.0.0........1.0.1........1.0.1........0.0.1........1.0.0

....1.0.0.1......1.0.1.0......1.1.1.0......1.0.1.0......1.1.0.0......1.0.1.0

...0.0.1.0.1....1.0.1.0.1....1.0.0.0.1....0.1.1.1.0....0.0.1.1.0....1.0.1.1.0

..1.1.1.1.1.1..1.1.1.1.1.0..1.0.1.1.0.1..1.1.0.0.1.1..0.1.1.0.0.1..0.1.0.0.0.0

CROSSREFS

Sequence in context: A112141 A077555 A166881 * A145237 A034256 A179539

Adjacent sequences:  A183276 A183277 A183278 * A183280 A183281 A183282

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved

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Last modified October 23 17:32 EDT 2019. Contains 328373 sequences. (Running on oeis4.)