A036439 a(n) = a(n-1) + prime(n-1), with a(1)=2.

2, 4, 7, 12, 19, 30, 43, 60, 79, 102, 131, 162, 199, 240, 283, 330, 383, 442, 503, 570, 641, 714, 793, 876, 965, 1062, 1163, 1266, 1373, 1482, 1595, 1722, 1853, 1990, 2129, 2278, 2429, 2586, 2749, 2916, 3089, 3268, 3449, 3640, 3833, 4030, 4229, 4440, 4663

Offset

1,1

Comments

Old name was "a(n) = 2 + the sum of the first n-1 prime numbers".

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

nxt[{n_, a_}]:={n+1, a+Prime[n]}; NestList[nxt, {1, 2}, 50][[All, 2]] (* Harvey P. Dale, Sep 21 2016 *)

Prog

(PARI) a(n) = 2 + sum(i=1, n-1, prime(i)); \\ Michel Marcus, Aug 12 2013

Crossrefs

A014284(n) + 1.

Sequence in context: A153252 A079719 A300829 * A175965 A288341 A347542

Adjacent sequences: A036436 A036437 A036438 * A036440 A036441 A036442

Keyword

nonn,easy

Author

Pavel Bubak (pbub6070(AT)beta.ms.mff.cuni.cz)

Extensions

More terms from James A. Sellers, Feb 06 2000

Offset changed and definition improved from Bruno Berselli, Jul 30 2013

Status

approved