A271244 Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different.

0, 0, 77, 39210, 48347502, 187829420863, 2247557960061633, 79899827658375960942

Offset

1,3

Comments

Column 6 of A271246.

Links

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

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.0......1.2......1.2......1.2......1.2......0.1......1.1......1.0
...2.1.3....0.1.3....3.0.3....0.0.3....3.4.4....2.3.0....1.2.2....1.1.2
..0.1.4.3..3.4.1.5..2.0.0.2..4.3.0.1..1.4.1.3..2.3.3.4..3.4.2.4..3.0.4.1

Crossrefs

Cf. A271246.

Sequence in context: A267956 A267910 A271243 * A271245 A196543 A201983

Adjacent sequences: A271241 A271242 A271243 * A271245 A271246 A271247

Keyword

nonn

Author

R. H. Hardin, Apr 02 2016

Status

approved