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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

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Last modified November 21 06:00 EST 2019. Contains 329350 sequences. (Running on oeis4.)