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A121248 Numbers n such that the sum of the first 2^n primes is a prime. 1
0, 1, 2, 6, 9, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Corresponding primes in the sums of the first 2^n primes or primes in A099825[n] are given in A113617[n] = {2,5,17,8893,868151,3875933,219554912086470964379,...}.

LINKS

Table of n, a(n) for n=1..6.

MATHEMATICA

Do[f=Sum[Prime[k], {k, 1, 2^n}]; If[PrimeQ[f], Print[{n, f}]], {n, 0, 32}]

CROSSREFS

Cf. A099825, A013916, A013918, A113617.

Sequence in context: A198230 A263495 A282079 * A268677 A108370 A325706

Adjacent sequences:  A121245 A121246 A121247 * A121249 A121250 A121251

KEYWORD

nonn

AUTHOR

Alexander Adamchuk, Aug 22 2006

EXTENSIONS

Edited by Robert G. Wilson v, Aug 26 2006

STATUS

approved

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Last modified September 23 04:54 EDT 2020. Contains 337295 sequences. (Running on oeis4.)