A214389 Number of 7X7X7 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors

128, 5247716, 3183854216, 405643523920, 21313909250888, 623154633711990, 11944886965820440, 166092394781968922, 1792145757381897992

Offset

1,1

Comments

Row 7 of A214384

Links

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

Example

Some solutions for n=3
........0..............0..............0..............0..............0
.......0.1............0.1............0.1............0.1............0.1
......1.0.1..........1.0.1..........1.0.1..........1.0.1..........1.0.1
.....1.0.1.0........1.0.1.0........1.0.1.0........1.0.1.0........1.0.1.0
....1.0.1.2.0......1.0.1.0.1......1.0.1.0.2......0.1.0.1.0......1.0.1.3.0
...1.0.2.0.2.0....2.1.0.2.0.1....1.0.2.0.2.3....0.3.0.1.2.0....1.3.0.3.2.0
..1.0.3.0.2.0.2..3.1.0.1.3.0.1..1.0.1.3.0.3.1..2.0.3.0.2.0.3..0.2.3.0.3.0.1

Crossrefs

Sequence in context: A346008 A017011 A196995 * A017095 A017191 A017299

Adjacent sequences: A214386 A214387 A214388 * A214390 A214391 A214392

Keyword

nonn

Author

R. H. Hardin Jul 14 2012

Status

approved