A061144 Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996.

0, 2, 70, 764, 4718, 20658, 71616, 209752, 540416, 1259050, 2704494, 5433420, 10320054, 18688026, 32478032, 54460064, 88495536, 139857842, 215617062, 325102172, 480442174, 697204602, 995133456, 1399002496, 1939589056

Offset: 1

Author

Zachary Franco, Apr 15 2001

Keywords

• nonn

Examples

			a(2)=4*(1/2)=2 and a(3)=32*(1/2)+32*(1)+4*(3/2)+8*(2)=70.
		

Links

• Nathaniel Johnston, C program for computing terms

Crossrefs

Cf. A045996.

Extensions

a(14)-a(25) and corrected offset from Nathaniel Johnston, Apr 29 2011