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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
OFFSET
1,1
COMMENTS
Sum of the reciprocals 1/a(n) rapidly converges to 0.3349291343132812638... - R. J. Mathar, Apr 27 2007
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
KEYWORD
easy,nonn
AUTHOR
Cino Hilliard, Mar 06 2005
EXTENSIONS
Edited by R. J. Mathar, Apr 27 2007
STATUS
approved