OFFSET
1,2
COMMENTS
a(21) > 10^12. - Lucas A. Brown, Oct 18 2020
LINKS
Lucas A. Brown, semiprimemods.py
EXAMPLE
a(3)=62 is a term because the 62nd semiprime (i.e., 194) == 8 (mod 62).
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Shyam Sunder Gupta, May 07 2005
EXTENSIONS
a(15)-a(20) by Lucas A. Brown, Oct 18 2020
a(1), a(2) by Lucas A. Brown, Nov 22 2020
STATUS
approved