OFFSET
1,1
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..10000
EXAMPLE
A114518(15) = 24 = 2^3 * 3 and 2^3 + 3 = 11 (which is prime). So a(15) = 11.
MATHEMATICA
f[n_] := Plus @@ Power @@@ FactorInteger[n]; Select[f /@ Range[175], PrimeQ[ # ] &] (* Ray Chandler, Dec 07 2005 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Dec 05 2005
EXTENSIONS
Extended by Ray Chandler and Lambert Herrgesell (zero815(AT)googlemail.com), Dec 07 2005
STATUS
approved