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A064772 Sum of primes dividing n^n+1 (with repetition). 1
2, 5, 11, 257, 526, 147, 1030, 1027, 530793, 31603, 58685, 2228292, 113060, 180326, 163123, 67280421584898, 45957792327018709129, 33414185, 870543318650, 4406613081350403, 22864393425065, 82812579069940, 1576297793, 27266016518 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..61

MATHEMATICA

Table[Total[Times@@@FactorInteger[n^n+1]], {n, 25}] (* Harvey P. Dale, Sep 17 2011 *)

PROG

(PARI) sopfr(n)= { local(f, s=0); f=factor(n); for(i=1, matsize(f)[1], s+=f[i, 1]*f[i, 2]); return(s) } { for (n=1, 61, write("b064772.txt", n, " ", sopfr(n^n + 1)) ) } \\ Harry J. Smith, Sep 24 2009

CROSSREFS

Cf. A014566, A001414.

Sequence in context: A098438 A225955 A236073 * A107989 A069504 A158997

Adjacent sequences:  A064769 A064770 A064771 * A064773 A064774 A064775

KEYWORD

nonn

AUTHOR

Jason Earls, Oct 19 2001

STATUS

approved

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Last modified June 6 01:16 EDT 2020. Contains 334858 sequences. (Running on oeis4.)