A183277 Number of n X n X n triangular binary arrays with no three 1's adjacent in a row in any of the three triangular directions.

2, 8, 45, 442, 7844, 227960, 11338707, 967001704, 139878150889, 34482378877062, 14485392134699640, 10360611912959874865, 12622082042125925192310, 26191137001819846311849551, 92562230432526123151485183549

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for 4 X 4 X 4 with no three 1's in a row:
.....0........1........0........0........1........0........1........0
....1.1......0.0......0.1......0.0......0.1......0.0......0.1......1.0
...0.0.0....0.1.0....0.0.0....1.1.0....0.1.0....0.1.1....1.1.0....0.1.0
..1.0.0.0..1.1.0.1..1.1.0.0..0.1.0.0..0.0.1.0..1.1.0.1..1.0.0.0..0.1.0.1

Crossrefs

Sequence in context: A144164 A003091 A119501 * A269006 A266507 A202081

Adjacent sequences: A183274 A183275 A183276 * A183278 A183279 A183280

Keyword

nonn

Author

R. H. Hardin, Jan 03 2011

Status

approved