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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
OFFSET
1,2
LINKS
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: A077555 A166881 A334602 * A145237 A034256 A179539
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved