A270508 Number of nXnXn triangular 0..6 arrays with some element plus some adjacent element totalling 6+1 exactly once.

0, 90, 40392, 65046258, 448630205184, 14156156843376732, 2109167396478578514420, 1510530585264765595630150668

Offset

1,2

Comments

Column 6 of A270509.

Links

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

Example

Some solutions for n=3
....3......1......6......1......4......1......4......2......3......6......5
...4.0....4.6....4.3....0.4....6.3....4.6....4.6....1.2....3.5....1.3....4.4
..6.5.6..6.6.0..2.1.0..4.2.5..6.0.2..0.0.6..4.4.1..3.6.6..4.5.5..0.5.5..1.1.3

Crossrefs

Cf. A270509.

Sequence in context: A278631 A323317 A246634 * A134648 A145413 A367459

Adjacent sequences: A270505 A270506 A270507 * A270509 A270510 A270511

Keyword

nonn

Author

R. H. Hardin, Mar 18 2016

Status

approved