A223070 Number of nX3 0..3 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope.

64, 1080, 38512, 899390, 22520656, 462313688, 9567328752, 178464221290, 3336648010448, 58641450033936, 1033599371410096, 17499076161248060, 297470720803662048, 4917593684170711306, 81699455573347788176

Offset: 1

Author

R. H. Hardin Mar 14 2013

Keywords

• nonn

Comments

Column 3 of A223071

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..25