A214534 Number of nXnXn triangular 0..2 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and every horizontal row having the same average value

3, 5, 15, 93, 1007, 17213, 461465, 19166997, 1246538209, 126946385993, 20342860627393, 5148359000639457

Offset

1,1

Comments

Column 2 of A214540

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=4
.....1........1........1........1........1........1........1........1
....1.1......2.0......2.0......0.2......1.1......0.2......0.2......1.1
...2.0.1....2.0.1....1.2.0....0.2.1....2.0.1....1.0.2....1.0.2....2.0.1
..1.2.0.1..1.2.0.1..1.2.0.1..0.2.1.1..0.2.0.2..0.2.0.2..1.0.1.2..2.0.1.1

Crossrefs

Sequence in context: A305873 A307999 A018771 * A270548 A292339 A175138

Adjacent sequences: A214531 A214532 A214533 * A214535 A214536 A214537

Keyword

nonn

Author

R. H. Hardin Jul 20 2012

Status

approved