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

Author

R. H. Hardin Dec 05 2011

Keywords

• nonn

Comments

Column 2 of A201836

Examples

			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
		

Links

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