A271139 Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all different.

0, 1, 56, 4890, 778256, 245558565, 158940847866, 214449879142050, 608705034569823114, 3658579907427743991339

Offset

1,3

Comments

Column 4 of A271141.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.1......0.1......1.1......0.1......1.1......1.1......1.0......1.2
...1.0.0....1.0.1....2.1.0....1.1.2....2.1.3....1.2.2....1.2.2....3.1.1
..2.2.0.2..1.0.2.1..2.1.1.3..0.0.2.2..1.1.1.0..0.1.0.0..0.1.2.0..2.3.3.3

Crossrefs

Cf. A271141.

Sequence in context: A003747 A049033 A271138 * A271140 A278324 A009600

Adjacent sequences: A271136 A271137 A271138 * A271140 A271141 A271142

Keyword

nonn

Author

R. H. Hardin, Mar 31 2016

Status

approved