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Search: id:A121558
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| A121558 |
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Primes of the form n + partition number of n. |
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+0
3
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| 2, 3, 5, 17, 23, 31, 73, 97, 127, 167, 191, 797, 1021, 1153, 1301, 3313, 9851, 40099, 206939, 345953, 444893, 570181, 2032409, 10327297, 15757649, 40982701, 69545527, 281138239, 657667789, 1333640927, 32173820179, 48626519377
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Numbers n such that n + A000009(n) is prime are in A121557.
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LINKS
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Robert G. Wilson v, Table of n, a(n) for n = 1..366 . [From Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 27 2009]
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MATHEMATICA
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okQ[n_]:=PrimeQ[n+PartitionsQ[n]]; genno[x_]:=x+PartitionsQ[x]; genno/@Select[Range[30000], okQ] [From Harvey P. Dale (hpd1(AT)nyu.edu), Jul 25 2009]
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PROGRAM
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(PARI) P=prod(k=1, 1000, 1+x^k, 1+x*O(x^1000)); for(n=1, 1000, t=n+polcoeff(P, n); if(isprime(t), print1(t, ", "))) [From Hagen von Eitzen (math(AT)von-eitzen.de), Jul 25 2009]
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CROSSREFS
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Cf. A000009, A000040, A121557.
Sequence in context: A111632 A049547 A049577 this_sequence A089442 A106859 A055472
Adjacent sequences: A121555 A121556 A121557 this_sequence A121559 A121560 A121561
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KEYWORD
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easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), Aug 07 2006, Aug 09 2006
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EXTENSIONS
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Filled in terms following 3313, and corrected all subsequent terms. - Harvey P. Dale (hpd1(AT)nyu.edu), Hagen von Eitzen (math(AT)von-eitzen.de) and Ray Chandler, Jul 25 2009
Edited by N. J. A. Sloane, Aug 17 2009
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