A271335 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.

0, 1, 36, 12195, 15971570, 71014748334, 1103274718331139, 61125440893226224056, 12230284091550675933621492, 8911161091229971516491937321818, 23780448467408594965822842655206068333

Offset

1,3

Comments

Column 3 of A271339.

Links

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

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.0......1.0......1.2......1.2......1.2......0.1......1.0......1.0
...1.2.2....1.2.1....3.2.2....0.2.2....3.0.0....2.3.1....2.2.0....2.3.0
..3.1.1.1..3.1.1.1..2.2.0.1..2.3.3.0..1.0.0.3..1.3.1.1..1.0.0.0..2.3.3.0

Crossrefs

Cf. A271339.

Sequence in context: A141475 A233126 A201003 * A233253 A134374 A263388

Adjacent sequences: A271332 A271333 A271334 * A271336 A271337 A271338

Keyword

nonn

Author

R. H. Hardin, Apr 04 2016

Status

approved