A271073 Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal.

0, 1, 35, 20376, 160121387, 8865338916430, 2712237121380964731, 4518105101556834520792016

Offset

1,3

Comments

Column 5 of A271075.

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......1.0......0.1......1.2......0.1......1.0......0.0......1.0
...1.1.2....1.1.2....2.0.1....1.2.1....2.0.0....0.2.3....1.2.2....0.0.0
..2.0.0.1..1.3.4.2..1.0.0.1..1.2.1.1..0.3.0.2..0.1.3.3..1.3.0.3..2.2.1.0

Crossrefs

Cf. A271075.

Sequence in context: A196542 A271072 A215570 * A271074 A249890 A285388

Adjacent sequences: A271070 A271071 A271072 * A271074 A271075 A271076

Keyword

nonn

Author

R. H. Hardin, Mar 29 2016

Status

approved