A271074 Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal.

0, 1, 35, 20610, 223627120, 28915310755268, 27358439337236435007, 169060028840088558937461518

Offset

1,3

Comments

Column 6 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
....1.2......0.1......1.2......1.2......1.2......1.0......0.1......1.0
...3.4.0....2.0.3....0.1.1....0.3.4....2.2.2....2.3.2....0.0.1....0.1.2
..3.3.4.0..2.2.4.2..0.0.3.2..2.3.3.1..1.3.4.2..2.3.3.3..2.3.0.1..1.1.2.2

Crossrefs

Cf. A271075.

Sequence in context: A271072 A215570 A271073 * A249890 A285388 A212926

Adjacent sequences: A271071 A271072 A271073 * A271075 A271076 A271077

Keyword

nonn

Author

R. H. Hardin, Mar 29 2016

Status

approved