1,1

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...

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

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

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

Sequence in context: A233328 A083294 A196780 * A299599 A244852 A064102

Adjacent sequences: A208503 A208504 A208505 * A208507 A208508 A208509

nonn

M. F. Hasler, Feb 27 2012

approved