A270601 Number of nXnXn triangular 0..3 arrays with some element plus some adjacent element totalling 3+1 or 3-1 exactly once.

0, 36, 312, 8808, 443088, 44168712, 8708857332, 3419936238138, 2684843924352546, 4225663875817457520, 13361604903790701175254, 85018381019087710839691584, 1089960283319115969602380739838, 28183582557929760913921018421335722

Offset

1,2

Comments

Column 3 of A270606.

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions for n=4
.....0........3........3........1........3........3........3........1
....0.3......0.2......3.3......3.0......0.3......0.3......3.0......3.0
...1.0.0....3.3.3....0.2.3....3.0.3....0.0.0....0.3.3....3.3.3....0.0.3
..3.0.3.3..3.3.0.0..0.3.3.3..0.3.0.0..0.1.1.0..1.3.3.0..2.0.0.0..0.0.0.0

Crossrefs

Cf. A270606.

Sequence in context: A219633 A219387 A222860 * A361187 A232828 A092643

Adjacent sequences: A270598 A270599 A270600 * A270602 A270603 A270604

Keyword

nonn

Author

R. H. Hardin, Mar 20 2016

Status

approved