A183282 Number of nXnXn triangular binary arrays with no element having four consecutive neighbors taken clockwise with value 1

2, 8, 54, 646, 14222, 555120, 38707416, 4852741246, 1088604700024, 437267393817902, 314722463901327496

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for 4X4
.....0........1........1........1........1........1........0........0
....0.0......0.1......1.0......0.0......0.0......1.1......0.0......1.1
...0.0.0....0.0.0....1.0.0....1.0.1....1.0.0....0.0.0....0.1.1....0.1.0
..0.0.1.1..1.1.0.0..1.0.1.1..1.0.1.0..0.1.0.0..0.0.0.0..0.0.1.1..0.0.1.0

Crossrefs

Sequence in context: A234301 A345249 A005440 * A139016 A367753 A134954

Adjacent sequences: A183279 A183280 A183281 * A183283 A183284 A183285

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved