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A070281 Smallest prime which is the sum of n consecutive primes, or 0 if no such prime exists. 2
2, 5, 23, 17, 53, 41, 197, 0, 127, 0, 233, 197, 691, 281, 379, 0, 499, 0, 857, 0, 953, 0, 1151, 0, 1259, 0, 1583, 0, 2099, 0, 2399, 0, 2417, 0, 2579, 0, 2909, 0, 3803, 0, 3821, 0, 4217, 0, 4651, 0, 5107, 0, 5813, 0, 6829, 0, 6079, 0, 6599, 0, 14153, 0, 10091, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sequence A013918 lists the nonzero numbers occurring at even n.

LINKS

Table of n, a(n) for n=1..60.

MATHEMATICA

f[n_] := Block[{k = 1, s}, If[Mod[n, 2] == 0, s = Sum[Prime[i], {i, k, k + n - 1}]; If[PrimeQ[s], s, 0], While[s = Sum[Prime[i], {i, k, k + n - 1}] ; ! PrimeQ[s], k++ ]; s]]; Table[f[n], {n, 65}] (* Ray Chandler, Sep 27 2006 *)

CROSSREFS

Cf. A070934.

Sequence in context: A034384 A078419 A241428 * A198444 A019368 A141171

Adjacent sequences:  A070278 A070279 A070280 * A070282 A070283 A070284

KEYWORD

nonn

AUTHOR

Amarnath Murthy, May 07 2002

EXTENSIONS

Corrected and extended by Jim Nastos, Jun 15 2002

Extended by Ray Chandler, Sep 27 2006

a(60) corrected by Giovanni Resta, May 31 2017

STATUS

approved

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Last modified November 14 04:40 EST 2019. Contains 329108 sequences. (Running on oeis4.)