A183272 Number of nXnXn triangular binary arrays with the number of 0-0 adjacencies equal to the number of 0-1 adjacencies

2, 1, 7, 28, 766, 27332, 2260870, 351499306, 106236125166, 62088483341152, 70051422859172023, 152250726458195220937, 636456428289962382785807

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for 4X4X4 with equal 0-0 and 0-1 adjacencies
.....0........1........1........0........1........0........0........0
....0.0......1.0......0.1......1.0......1.0......0.0......0.0......0.0
...1.1.0....0.0.0....0.0.0....1.0.0....0.1.0....1.0.0....0.1.1....0.1.0
..1.0.0.0..0.0.1.1..0.0.1.1..0.1.0.0..0.0.0.0..0.1.1.0..0.0.0.1..0.0.1.1

Crossrefs

Sequence in context: A235378 A214327 A320519 * A138346 A085073 A131288

Adjacent sequences: A183269 A183270 A183271 * A183273 A183274 A183275

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved