A271192 Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all different.

0, 1, 72, 10794, 4426829, 5718522642, 24423371106474, 338850797028187860

Offset

1,3

Comments

Column 6 of A271194.

Links

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

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.1......1.0......1.1......0.0......0.0......1.1......0.0......1.1
...2.1.0....1.2.0....0.1.1....0.1.2....1.0.0....0.0.0....0.1.0....2.1.3
..2.1.3.1..0.1.2.1..0.2.0.1..3.0.0.2..2.3.3.0..2.3.0.0..2.2.2.3..1.4.1.1

Crossrefs

Cf. A271194.

Sequence in context: A146500 A271190 A271191 * A271193 A289369 A048544

Adjacent sequences: A271189 A271190 A271191 * A271193 A271194 A271195

Keyword

nonn

Author

R. H. Hardin, Apr 01 2016

Status

approved