A271334 Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.

0, 1, 33, 3798, 960152, 577747260, 859484671068, 3228364497866668, 31015380724025975076, 768618082059444147510936, 49424325752577827724130126584, 8281603003824497703886704133613172

Offset

1,3

Comments

Column 2 of A271339.

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.1......1.2......1.0......1.0......1.2......1.0......0.1......0.0
...2.1.1....0.2.1....2.0.1....1.0.0....0.1.2....0.1.1....0.1.1....1.1.1
..0.1.2.1..0.0.2.0..0.0.0.2..1.2.1.2..1.2.2.2..1.1.1.2..0.1.0.2..0.0.2.2

Crossrefs

Cf. A271339.

Sequence in context: A282374 A281933 A232292 * A230182 A350722 A354674

Adjacent sequences: A271331 A271332 A271333 * A271335 A271336 A271337

Keyword

nonn

Author

R. H. Hardin, Apr 04 2016

Status

approved