A271400 Number of nXnXn triangular 0..1 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal.

0, 0, 8, 216, 6048, 203256, 8627472, 475098048, 34505348760, 3341298530016, 434656549010376, 76372500634028280, 18198479103071529600, 5898858710813046614376, 2607147775322232410982384

Offset

1,3

Comments

Column 1 of A271407.

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.1......1.1......0.1......1.1......0.0......1.0......1.1......1.0
...0.0.1....0.1.0....0.1.1....0.0.0....0.1.1....1.0.0....0.1.1....1.1.1
..0.0.1.0..0.1.0.1..0.0.1.1..0.1.0.1..0.1.1.0..1.1.0.0..0.0.0.1..1.0.1.0

Crossrefs

Cf. A271407.

Sequence in context: A069045 A288323 A264056 * A123057 A353933 A362073

Adjacent sequences: A271397 A271398 A271399 * A271401 A271402 A271403

Keyword

nonn

Author

R. H. Hardin, Apr 06 2016

Status

approved