A172167 Partial sums of A005109.

2, 5, 10, 17, 30, 47, 66, 103, 176, 273, 382, 545, 738, 995, 1428, 1915, 2492, 3261, 4414, 5711, 7170, 9763, 12680, 16137, 20026, 30395, 42684, 60181, 78614, 117981, 170470, 236007, 375976, 523433, 733386, 1065163, 1537556, 2167413, 2913910

Offset: 1

Author

Jonathan Vos Post, Jan 28 2010

Keywords

• easy
• nonn

Examples

			a(20) = 2 + 3 + 5 + 7 + 13 + 17 + 19 + 37 + 73 + 97 + 109 + 163 + 193 + 257 + 433 + 487 + 577 + 769 + 1153 + 1297 = 5711.
		

Crossrefs

Cf. A005109.

Formula

a(n) = Sum_{i=1..n} A005109(i).

Extensions

More terms from R. J. Mathar, Feb 07 2010