OFFSET
1,2
COMMENTS
a(43) > 10^12. - Lucas A. Brown, Nov 22 2020
LINKS
Lucas A. Brown, Table of n, a(n) for n = 1..42
Lucas A. Brown, semiprimemods.py
EXAMPLE
a(5)=13 is a term because the 13th semiprime (i.e., 35) == 9 (mod 13).
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Shyam Sunder Gupta, May 07 2005
EXTENSIONS
a(24)-a(25) from Donovan Johnson, Oct 29 2008
a(1)-a(4), a(26)-a(42) by Lucas A. Brown, Nov 22 2020
STATUS
approved