OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MAPLE
MATHEMATICA
Total[IntegerDigits[#]]&/@Select[Range[300], PrimeOmega[#]==2&] (* Harvey P. Dale, Jun 12 2012 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Juri-Stepan Gerasimov, Apr 04 2010
EXTENSIONS
Entries checked by R. J. Mathar, Aug 12 2010
STATUS
approved