A270604 Number of nXnXn triangular 0..6 arrays with some element plus some adjacent element totalling 6+1 or 6-1 exactly once.

0, 120, 23448, 13177740, 25162747992, 176610474548304, 4757551848002860896, 504235830402554520290820, 213082697840230591135069403580

Offset

1,2

Comments

Column 6 of A270606.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=3
....4......3......6......5......0......1......2......5......6......1......2
...5.4....6.2....6.6....3.5....0.3....0.3....3.6....4.6....3.0....6.0....4.0
..1.4.6..4.6.4..3.2.0..2.6.5..2.3.6..0.2.6..0.0.4..5.2.6..1.2.2..6.4.2..2.6.1

Crossrefs

Cf. A270606.

Sequence in context: A229693 A105188 A264957 * A151604 A104008 A278726

Adjacent sequences: A270601 A270602 A270603 * A270605 A270606 A270607

Keyword

nonn

Author

R. H. Hardin, Mar 20 2016

Status

approved