A064772 Sum of primes dividing n^n+1 (with repetition).

2, 5, 11, 257, 526, 147, 1030, 1027, 530793, 31603, 58685, 2228292, 113060, 180326, 163123, 67280421584898, 45957792327018709129, 33414185, 870543318650, 4406613081350403, 22864393425065, 82812579069940, 1576297793, 27266016518

Offset: 1

Author

Jason Earls, Oct 19 2001

Keywords

• nonn

Links

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

Crossrefs

Cf. A014566, A001414.

Programs

Mathematica

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

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