OFFSET
1,1
COMMENTS
a(45) > 8040423200947.
LINKS
Lucas A. Brown, Table of n, a(n) for n = 1..44
Lucas A. Brown, semiprimemods.py
EXAMPLE
The 1st semiprime is 4, which is congruent to 1 (mod 1), so 4 is in the sequence.
The 4th semiprime is 10, which is congruent to 2 (mod 4), so 10 is not in the sequence.
The 27th semiprime is 82, which is congruent to 1 (mod 27), so 82 is in the sequence.
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Lucas A. Brown, Oct 13 2022
STATUS
approved