A201212 Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards.

51, 867, 11932, 146946, 1692945, 18624423, 198262359, 2055746385, 20869314255, 208139081237, 2045065967111, 19837690800848, 190312987378848, 1808321481842796, 17039496826295448, 159395007901738133

Offset: 1

Author

R. H. Hardin Nov 28 2011

Keywords

• nonn

Comments

Column 4 of A201216

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..29