OFFSET
1,1
COMMENTS
a(28) > 8040423200947.
a(28) <= 1095927464608618, a(29) <= 1095927464608951 and a(38) <= 1095927464630173. - Martin Ehrenstein, Oct 28 2022
LINKS
Lucas A. Brown, semiprimemods.py.
EXAMPLE
The 1st semiprime is 4, which is congruent to 4 (modulo 1), so 4 is in the sequence.
The 2nd semiprime is 6, which is congruent to 4 (modulo 2), so 6 is in the sequence.
The 3rd semiprime is 9, which is not congruent to 4 (modulo 3), so 9 is not in the sequence.
The 4th semiprime is 10, which is not congruent to 4 (modulo 4), so 10 is not in the sequence.
The 5th semiprime is 14, which is congruent to 4 (modulo 5), so 14 is in the sequence.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Lucas A. Brown, Oct 13 2022
STATUS
approved