login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A109723 Sum of the first 2n+1 primes. 4
2, 10, 28, 58, 100, 160, 238, 328, 440, 568, 712, 874, 1060, 1264, 1480, 1720, 1988, 2276, 2584, 2914, 3266, 3638, 4028, 4438, 4888, 5350, 5830, 6338, 6870, 7418, 7982, 8582, 9206, 9854, 10538, 11240, 11966, 12718, 13490, 14288, 15116, 15968, 16840 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Bisection of A007504.

LINKS

Ray Chandler, Table of n, a(n) for n = 0..10000

FORMULA

a(n) = A007504(2n+1).

MATHEMATICA

f[n_] := Sum[Prime[k], {k, n}]; Table[f[2n + 1], {n, 0, 42}]

Take[Accumulate[Prime[Range[160]]], {1, 160, 2}] (* Harvey P. Dale, Jan 11 2011 *)

PROG

(PARI) a(n) = sum(k=1, 2*n+1, prime(k)); \\ Michel Marcus, Jan 31 2019

CROSSREFS

Cf. A007504, A109722, A109724, A109725, A109726.

Sequence in context: A220700 A057753 A060515 * A053594 A006331 A252591

Adjacent sequences: A109720 A109721 A109722 * A109724 A109725 A109726

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Aug 10 2005

EXTENSIONS

Edited and extended by Ray Chandler, Aug 11 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 30 19:14 EST 2022. Contains 358453 sequences. (Running on oeis4.)