A214346 Number of nXnXn triangular 0..2 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors

3, 17, 169, 2853, 80573, 3778867, 293207907, 37563586269, 7937469117891, 2764964877941141, 1587376056676684453, 1501785457780559131093, 2341332949071519298798233

Offset

1,1

Comments

Column 2 of A214352

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=3
....2......2......0......1......1......1......1......0......0......2......1
...0.2....2.1....0.2....1.1....1.1....2.1....2.0....2.0....0.1....0.2....1.2
..0.2.1..2.0.1..0.2.2..1.0.1..0.2.1..2.2.1..1.2.0..2.2.0..0.0.2..2.0.2..0.1.2

Crossrefs

Sequence in context: A052143 A268758 A069856 * A015083 A263460 A053934

Adjacent sequences: A214343 A214344 A214345 * A214347 A214348 A214349

Keyword

nonn

Author

R. H. Hardin Jul 13 2012

Status

approved