A173765 Partial sums of A005200.

1, 3, 7, 18, 46, 124, 337, 935, 2605, 7328, 20684, 58670, 166863, 476032, 1360955, 3899324, 11191494, 32173714, 92625281, 267010344, 770610783, 2226438062, 6438902174, 18638275524, 53995855636, 156548609636, 454200201824

Offset: 1

Author

Jonathan Vos Post, Feb 24 2010

Keywords

• easy
• nonn

Comments

x. The subsequence of primes in this partial sum begins: 3, 7, 337, 121208284196421093429539251 = a(58).

Examples

			a(28) = 1 + 2 + 4 + 11 + 28 + 78 + 213 + 598 + 1670 + 4723 + 13356 + 37986 + 108193 + 309169 + 884923 + 2538369 + 7292170 + 20982220 + 60451567 + 174385063 + 503600439 + 1455827279 + 4212464112 + 12199373350 + 35357580112 + 102552754000 + 297651592188 + 86446068277.
		

Crossrefs

Cf. A005200, A000081, A005201, A000055.

Formula

a(n) = SUM[i=1..n] A005200(i).