A214545 Number of 7X7X7 triangular 0..n 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

2, 461465, 6042900, 292689331, 3442622120, 39956910039, 323258584792, 2193244910385

Offset

1,1

Comments

Row 7 of A214540

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=2
........1..............1..............1..............1..............1
.......0.2............0.2............0.2............0.2............0.2
......0.1.2..........0.2.1..........1.0.2..........1.0.2..........0.1.2
.....0.1.1.2........0.2.1.1........2.0.2.0........1.0.1.2........0.1.1.2
....1.0.1.1.2......1.0.2.1.1......1.2.0.2.0......1.2.0.2.0......0.1.1.1.2
...1.0.2.1.0.2....1.1.0.2.1.1....1.2.0.1.2.0....1.2.1.0.2.0....0.2.1.0.2.1
..2.0.0.2.0.1.2..0.1.0.2.1.2.1..0.2.2.0.2.0.1..1.2.1.0.1.2.0..0.2.2.0.0.2.1

Crossrefs

Sequence in context: A018854 A139181 A172994 * A072321 A237191 A367823

Adjacent sequences: A214542 A214543 A214544 * A214546 A214547 A214548

Keyword

nonn

Author

R. H. Hardin Jul 20 2012

Status

approved