A173765 - OEIS

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

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OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..27.

FORMULA

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

EXAMPLE

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.

Sequence in context: A094297 A026107 A372033 * A027969 A027971 A219233

Adjacent sequences: A173762 A173763 A173764 * A173766 A173767 A173768

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post, Feb 24 2010

STATUS

approved