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A208506 p^(p+1) + (p+1)^p, where p = prime(n). 2
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
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: A364155 A083294 A196780 * A299599 A244852 A064102
KEYWORD
nonn
AUTHOR
M. F. Hasler, Feb 27 2012
STATUS
approved

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)