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

1,1

Links

Table of n, a(n) for n=1..39.

Formula

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

Example

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.

Sequence in context: A294562 A109377 A109472 * A173060 A173520 A360749

Adjacent sequences: A172164 A172165 A172166 * A172168 A172169 A172170

Keyword

easy,nonn

Author

Jonathan Vos Post, Jan 28 2010

Extensions

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

Status

approved