A271336 Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.

0, 1, 36, 18054, 71737645, 1362466441524, 116575962939900339, 45581482786366761792674, 82453748433709497031355883570

Offset

1,3

Comments

Column 4 of A271339.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......0.0......1.0......1.2......1.2......0.0......1.2......1.2
...1.1.2....1.1.1....1.1.2....3.3.1....3.3.2....1.2.2....0.0.2....3.1.1
..2.1.0.2..2.3.4.3..3.1.3.1..1.4.1.1..3.3.1.1..1.3.4.0..0.3.2.2..3.3.3.1

Crossrefs

Cf. A271339.

Sequence in context: A134374 A263388 A159423 * A196885 A271337 A203329

Adjacent sequences: A271333 A271334 A271335 * A271337 A271338 A271339

Keyword

nonn

Author

R. H. Hardin, Apr 04 2016

Status

approved