A201830 Number of nX2 0..3 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally

10, 50, 212, 823, 3030, 10777, 37530, 128742, 437110, 1472736, 4933374, 16449879, 54649472, 181008926, 598052300, 1971884632, 6490418396, 21331768570, 70022479666, 229604183052, 752170525867, 2462061236121, 8053252606139

Offset

1,1

Comments

Column 2 of A201836

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

Some solutions for n=7
..0..1....0..1....0..1....0..0....0..0....0..0....0..0....1..1....0..0....0..0
..1..1....1..2....0..1....0..1....1..1....1..1....0..0....1..2....1..1....1..2
..2..2....1..2....1..3....2..3....1..1....1..3....2..2....1..3....1..1....1..1
..1..3....1..2....1..3....1..3....1..2....1..3....2..2....1..2....1..2....1..1
..2..2....2..3....1..2....2..2....1..2....3..3....1..3....2..2....1..1....1..1
..2..3....3..3....2..3....1..2....1..2....3..3....1..3....2..2....1..1....1..1
..3..3....3..3....2..3....1..2....1..2....2..3....1..3....2..3....1..1....3..3

Crossrefs

Sequence in context: A237655 A261648 A086462 * A192019 A201210 A003207

Adjacent sequences: A201827 A201828 A201829 * A201831 A201832 A201833

Keyword

nonn

Author

R. H. Hardin Dec 05 2011

Status

approved