A271401 Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal.

0, 0, 14, 2592, 896832, 685305792, 1246974564672, 5607184696618752, 63628800211599189696, 1845949854751814927534400, 138092017951559818658767383936, 26797163221892636458271315168303232

Offset

1,3

Comments

Column 2 of A271407.

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......0.1......0.0......1.1......1.2......1.1......1.1......1.0
...2.2.2....2.0.0....1.1.2....0.0.0....2.2.0....0.1.0....0.1.2....0.0.2
..1.1.2.1..1.1.0.0..1.1.0.1..0.0.2.1..0.2.2.1..0.0.1.2..0.1.0.1..1.0.1.1

Crossrefs

Cf. A271407.

Sequence in context: A268424 A079918 A199648 * A013719 A145188 A279526

Adjacent sequences: A271398 A271399 A271400 * A271402 A271403 A271404

Keyword

nonn

Author

R. H. Hardin, Apr 06 2016

Status

approved