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Search: id:A117092
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| A117092 |
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Numbers n such that nextprime(2*n)>2*nextprime(n) (if p is prime then nextprime(p)=p). |
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+0
1
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| 2, 3, 4, 5, 7, 10, 11, 12, 13, 16, 17, 19, 22, 23, 27, 28, 29, 31, 37, 40, 41, 42, 43, 45, 46, 47, 52, 53, 57, 58, 59, 60, 61, 66, 67, 70, 71, 72, 73, 79, 82, 83, 87, 88, 89, 97, 100
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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nextprime(2*12)=29 and nextprime(2)*nextprime(12)=2*13 then 12 is member because 29>26
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PROGRAM
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(PARI) for(i=1, 100, if(nextprime(2*i)<nextprime(2)*nextprime(i), print1(i, ", ")))
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CROSSREFS
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Sequence in context: A137929 A094617 A047502 this_sequence A002504 A133431 A123091
Adjacent sequences: A117089 A117090 A117091 this_sequence A117093 A117094 A117095
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KEYWORD
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easy,nonn
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AUTHOR
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Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006
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EXTENSIONS
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Corrected by T. D. Noe (noe(AT)sspectra.com), Oct 25 2006
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