A271337 Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.

0, 1, 36, 19620, 150055420, 8655860751612, 2853581910745313142, 5244566229048315244775584

Offset

1,3

Comments

Column 5 of A271339.

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.2......1.2......1.1......1.0......1.2......0.1......0.1......1.2
...1.1.0....3.4.0....1.2.2....2.0.0....3.2.0....1.1.1....0.0.0....3.2.2
..3.0.2.3..1.1.0.0..1.1.0.1..3.1.3.4..3.3.2.3..2.0.0.1..1.1.2.0..2.4.4.0

Crossrefs

Cf. A271339.

Sequence in context: A159423 A271336 A196885 * A203329 A271338 A001308

Adjacent sequences: A271334 A271335 A271336 * A271338 A271339 A271340

Keyword

nonn

Author

R. H. Hardin, Apr 04 2016

Status

approved