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Search: id:A104129
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| A104129 |
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Integers of the form p^(p-1)+p where p is prime. |
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+0
1
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| 4, 12, 630, 117656, 25937424612, 23298085122494, 48661191875666868498, 104127350297911241532860, 907846434775996175406740561352, 88540901833145211536614766025207452637390
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Sum of the reciprocals 1/a(n) rapidly converges to 0.3349291343132812638... - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 27 2007
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FORMULA
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a(n) = A036878(n)+p where p=A00040(n). For p>2, a(n)=p*[1+A085531(A005097(n-1))]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 27 2007
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CROSSREFS
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Adjacent sequences: A104126 A104127 A104128 this_sequence A104130 A104131 A104132
Sequence in context: A131491 A009506 A085116 this_sequence A009516 A024248 A130539
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Mar 06 2005
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 27 2007
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