A271515 Number of nXnXn triangular 0..3 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal and exactly one upright 2x2x2 triangle having values all different.

0, 0, 12, 2961, 948561, 526617762, 562292792592, 1216012764422331, 5487274513266786993, 52651038343578804040698, 1087983884115200260451577219

Offset

1,3

Comments

Column 3 of A271517.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......1.2......0.0......1.1......0.0......1.1......1.2......1.1
...0.0.1....3.1.1....0.1.2....1.1.2....1.2.0....2.2.0....2.1.1....2.2.1
..2.0.0.2..3.3.1.2..0.1.3.2..1.3.3.1..1.2.1.1..2.2.3.0..1.2.1.1..0.0.1.1

Crossrefs

Cf. A271517.

Sequence in context: A111237 A028666 A103658 * A231042 A370300 A283831

Adjacent sequences: A271512 A271513 A271514 * A271516 A271517 A271518

Keyword

nonn

Author

R. H. Hardin, Apr 09 2016

Status

approved