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 A104129 Integers of the form p^(p-1)+p where p is prime. 1
 4, 12, 630, 117656, 25937424612, 23298085122494, 48661191875666868498, 104127350297911241532860, 907846434775996175406740561352, 88540901833145211536614766025207452637390 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Sum of the reciprocals 1/a(n) rapidly converges to 0.3349291343132812638... - R. J. Mathar, Apr 27 2007 LINKS FORMULA From R. J. Mathar, Apr 27 2007: (Start) a(n) = A036878(n)+p where p=A000040(n). For p>2, a(n) = p*[1+A085531(A005097(n-1))]. (End) CROSSREFS Cf. A000040, A005097, A036878, A085531. Sequence in context: A009506 A299808 A085116 * A144631 A009516 A266500 Adjacent sequences:  A104126 A104127 A104128 * A104130 A104131 A104132 KEYWORD easy,nonn AUTHOR Cino Hilliard, Mar 06 2005 EXTENSIONS Edited by R. J. Mathar, Apr 27 2007 STATUS approved

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Last modified November 29 09:50 EST 2021. Contains 349416 sequences. (Running on oeis4.)