OFFSET
1,1
FORMULA
a(n) = (A175461(n) - 5)/8.
MATHEMATICA
Select[Range[200], PrimeOmega[8#+5]==2&] (* Harvey P. Dale, Aug 07 2011 *)
PROG
(Magma) IsSemiprime:=func< n | &+[ k[2]: k in Factorization(n) ] eq 2 >; [ n: n in [2..200] | IsSemiprime(8*n+5) ]; // Vincenzo Librandi, Dec 13 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, May 24 2010
STATUS
approved