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Search: id:A013918
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| A013918 |
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Numbers n such that n is prime and is equal to the sum of the first k primes for some k. |
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+0
24
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| 2, 5, 17, 41, 197, 281, 7699, 8893, 22039, 24133, 25237, 28697, 32353, 37561, 38921, 43201, 44683, 55837, 61027, 66463, 70241, 86453, 102001, 109147, 116533, 119069, 121631, 129419, 132059, 263171, 287137, 325019, 329401, 333821, 338279, 342761
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..10000
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FORMULA
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a(n) = A007504(A013916(n))
Intersection of A000040 and A007504. - David W. Wilson, May 11 2007
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MAPLE
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P:=proc(n) local i, j; j:=2; for i from 2 by 1 to n do j:=j+ithprime(i); if isprime(j) then print(j); fi; od; end: P(1000); - Paolo P. Lava (ppl(AT)spl.at), May 05 2006
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MATHEMATICA
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lst={}; s=0; Do[p=Prime[n]; s=s+p; If[PrimeQ[s], AppendTo[lst, s]], {n, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 01 2008]
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CROSSREFS
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Cf. A013916, A013917.
Sequence in context: A122566 A118500 A080898 this_sequence A007351 A076076 A136194
Adjacent sequences: A013915 A013916 A013917 this_sequence A013919 A013920 A013921
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Renaud Lifchitz (100637.64(AT)CompuServe.COM)
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EXTENSIONS
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More terms from David W. Wilson (davidwwilson(AT)comcast.net)
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