A189810 Number of right triangles on a (n+1)X6 grid.

68, 238, 524, 926, 1444, 2060, 2784, 3596, 4492, 5470, 6516, 7630, 8820, 10070, 11380, 12758, 14204, 15710, 17276, 18902, 20596, 22350, 24164, 26038, 27972, 29970, 32028, 34146, 36324, 38562, 40860, 43218, 45636, 48114, 50652, 53250, 55908, 58626, 61404

Offset: 1

Author

R. H. Hardin Apr 28 2011

Keywords

• nonn

Comments

Column 5 of A189814

Examples

			Some solutions for n=3
..3..5....0..3....3..4....0..0....2..5....3..1....3..3....1..2....3..2....1..2
..0..5....0..2....1..4....0..3....1..5....0..1....0..3....1..3....0..0....1..5
..3..0....1..3....3..0....3..0....2..2....3..4....3..1....2..2....1..5....2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n) = 30*n^2 + 468*n - 2478 for n>24