A271191 Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all different.

0, 1, 72, 10794, 4396148, 5372968836, 19590379147806, 206003718526985328, 6097257359554668961413

Offset

1,3

Comments

Column 5 of A271194.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.2......1.0......1.1......1.0......0.1......1.0......1.0......1.2
...2.2.2....0.1.0....2.1.3....1.0.2....2.2.3....2.0.0....0.0.2....1.2.2
..2.1.2.3..2.2.0.0..3.3.1.4..1.2.1.1..2.3.3.4..0.0.2.2..3.2.0.2..0.1.2.0

Crossrefs

Cf. A271194.

Sequence in context: A093236 A146500 A271190 * A271192 A271193 A289369

Adjacent sequences: A271188 A271189 A271190 * A271192 A271193 A271194

Keyword

nonn

Author

R. H. Hardin, Apr 01 2016

Status

approved