A271137 Number of n X n X n triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one 2 X 2 X 2 triangle having values all different.

0, 1, 44, 2529, 239700, 41288768, 13536514992, 8663986363705, 10993523599196564, 27931583281337318808, 143073130086443218161862, 1484701531903686677651991942, 31325520846551262114728413158870

Offset

1,3

Comments

Column 2 of A271141.

Links

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

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......0.0......1.2......1.2......1.0......1.1......1.1......1.1
...1.0.2....1.2.2....1.1.2....1.2.2....2.2.2....1.2.0....2.2.0....1.1.1
..1.0.1.2..1.2.2.2..1.2.2.2..1.1.1.1..2.0.2.1..2.1.2.0..2.2.0.2..0.1.0.2

Crossrefs

Cf. A271141.

Sequence in context: A233941 A329302 A359885 * A234833 A282186 A200899

Adjacent sequences: A271134 A271135 A271136 * A271138 A271139 A271140

Keyword

nonn

Author

R. H. Hardin, Mar 31 2016

Status

approved