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Search: id:A139019
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| A139019 |
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a(1)=1. a(n) = smallest prime > a(n-1) such that sum{k=1 to n} a(k) is a power of a prime. |
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+0 3
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| 1, 2, 5, 11, 13, 17, 79, 83, 33554221, 33554501, 2198956146619, 2198956147781, 9002801275337659, 9002801275339331
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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PROGRAM
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(PARI) s=p=1; for(i=1, 10, print1(k", "); while(omega(s+p=nextprime(p+1))>1, ); s+=p)
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CROSSREFS
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Cf. A139020, A139021.
Sequence in context: A086518 A156672 A145669 this_sequence A031869 A045360 A001915
Adjacent sequences: A139016 A139017 A139018 this_sequence A139020 A139021 A139022
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KEYWORD
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more,nonn
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AUTHOR
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Leroy Quet Apr 06 2008
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EXTENSIONS
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Corrected and extended by M. F. Hasler (Maximilian.Hasler(AT)gmail.com), Apr 06 2008
a(11)-a(14) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Nov 30 2008
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