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A208506 p^(p+1) + (p+1)^p, where p = prime(n). 1
17, 145, 23401, 7861953, 3881436747409, 4731091158953433, 16248996011806421522977, 42832853457545958193355601, 535823088031930481975544151644865, 81325936178163422902293018227199467668020601 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The definition has been the erroneous description of A104128 (as pointed out by H. P. Dale), prior to correction by R. J. Mathar on Feb 27 2012.

Sum of reciprocals rapidly converges to 0.065762941547548273299583...

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..70

MATHEMATICA

ok[n_] := n^(n+1)+(n+1)^n; Table[ok[n], {n, Prime[Range[10]]}] (* Harvey P. Dale, Feb 27 2012 *)

PROG

(PARI) A208506(n)=(1+n=prime(n))^n+n^(n+1)

CROSSREFS

Sequence in context: A233328 A083294 A196780 * A244852 A064102 A161497

Adjacent sequences:  A208503 A208504 A208505 * A208507 A208508 A208509

KEYWORD

nonn

AUTHOR

M. F. Hasler, Feb 27 2012

STATUS

approved

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Last modified September 24 21:29 EDT 2017. Contains 292441 sequences.