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Search: id:A165660
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| 1, 3, 2, 8, 13, 18, 27, 29, 23, 56, 7, 74, 44, 98, 67, 49, 171, 200, 217, 28, 137, 309, 17, 116, 209, 448, 471, 174, 571, 629, 137, 739, 111, 793, 853, 318, 997, 1002, 560, 164, 610, 446, 1419, 1466, 385, 1615, 1573, 1633, 1707, 1825, 946, 662, 2221, 781, 1198
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OFFSET
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1,2
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COMMENT
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Conjecture: with the exception of the second term, 2 <= A165659(n)/a(n) < 3.
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PROGRAM
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(PARI) a1(n)=sum(i=1, n, prime(i)); b1(n)=sum(i=1, n, prime(n+1)%prime(i)); a(n)=if(n<0, 0, denominator(a1(n)/b1(n))); for(n=1, 50, print1(a(n) ", "))
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CROSSREFS
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Cf. A007504, A033995, A002110, A102647, A165657, A165658, A165659
Sequence in context: A095013 A094188 A088551 this_sequence A107300 A047946 A066045
Adjacent sequences: A165657 A165658 A165659 this_sequence A165661 A165662 A165663
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KEYWORD
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easy,nonn
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AUTHOR
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Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Sep 24 2009
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EXTENSIONS
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Terms corrected by Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Oct 03 2009
Removed a conjecture - R. J. Mathar, Oct 09 2009
Typo in definition corrected by Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Oct 09 2009
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