A271435 Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal and exactly one 2x2x2 triangle having values all different.

0, 0, 12, 1620, 148392, 14979216, 1978392960, 370450049664, 102638643985920, 43175669754811392

Offset

1,3

Comments

Column 4 of A271437.

Links

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

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......1.0......1.1......1.0......1.1......1.1......0.1......1.0
...1.1.1....2.2.2....2.2.2....2.2.2....2.0.0....0.2.1....2.2.2....2.1.0
..2.3.3.1..0.0.2.3..0.3.2.4..2.0.2.0..0.2.0.3..0.0.2.2..1.2.3.3..0.1.0.0

Crossrefs

Cf. A271437.

Sequence in context: A013515 A159383 A015011 * A271436 A034280 A146201

Adjacent sequences: A271432 A271433 A271434 * A271436 A271437 A271438

Keyword

nonn

Author

R. H. Hardin, Apr 07 2016

Status

approved