OFFSET
1,1
COMMENTS
Each of the first 17 terms has 3 distinct prime divisors. [updated Apr 22 2024]
a(6) <= 94812683932464811561. A term with 4 prime factors is 9584146525723596902470058833132261. - Daniel Suteu, Jul 24 2021
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..17 (terms below 10^22 calculated using data from Claude Goutier)
EXAMPLE
938531360353681 = 53881 * 107761 * 161641 is a term since it is a Carmichael number, and A003961(938531360353681) = 53887 * 107773 * 161659 = 938844932257009 is also a Carmichael number.
CROSSREFS
KEYWORD
nonn
AUTHOR
Amiram Eldar, Jul 23 2021
EXTENSIONS
a(6) verified and a(7)-a(13) calculated using using data from Claude Goutier by Amiram Eldar, Apr 22 2024
STATUS
approved