OFFSET
1,1
LINKS
Eric Weisstein, World of Mathematics, Semiprime.
EXAMPLE
34 is in the sequence because both 9 and 9+semiprime(9) = 9+25 = 34 are semiprimes.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Nov 20 2004
EXTENSIONS
Edited, corrected and extended by Ray Chandler, Nov 26 2004
STATUS
approved