OFFSET
1,1
EXAMPLE
6,10,14,15,21,22,26,33,34,35,38,39,46,..A006881 Numbers that are the product of two distinct primes 69=34+35, 77=38+39, 85=39+46,.. 69=3*13, 77=7*11, 85=5*13,..
MATHEMATICA
f[n_]:=Last/@FactorInteger[n]=={1, 1}; a=6; lst={}; Do[If[f[n], p=a+n; If[f[p], AppendTo[lst, p]]; a=n], {n, 9, 7!}]; lst
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky, Nov 26 2009
STATUS
approved