OFFSET
1,1
COMMENTS
a(48) > 8040423200947.
LINKS
Lucas A. Brown, Table of n, a(n) for n = 1..47
Lucas A. Brown, semiprimemods.py
EXAMPLE
The 1st semiprime is 4, which is congruent to 3 (mod 1), so 4 is in the sequence.
The 2nd semiprime is 6, which is not congruent to 3 (mod 2), so 6 is not in the sequence.
The 3rd semiprime is 9, which is congruent to 3 (mod 3), so 9 is in the sequence.
The 4th semiprime is 10, which is not congruent to 3 (mod 4), so 10 is not in the sequence.
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Lucas A. Brown, Oct 13 2022
STATUS
approved