OFFSET
1,1
COMMENTS
Each term has at least A001276(4) = 15 distinct prime factors and A108227(4) = 18 prime factors counted with multiplicity. - Jianing Song, Apr 13 2021
The smallest term with exactly 15 distinct prime factors is a(830) = 465709156638373299218537971 = 7^3 * 11^2 * 13^2 * 17^2 * 19 * 23 * ... * 61. - Jianing Song, Apr 14 2021
LINKS
David A. Corneth, Table of n, a(n) for n = 1..2187
EXAMPLE
k = 20169691981106018776756331 is in the sequence as its smallest prime factor is at least 7 and it is abundant as sigma(k) > 2*k.
PROG
(PARI) is(n) = gcd(n, 30) == 1 && sigma(n) > 2*n
CROSSREFS
KEYWORD
nonn
AUTHOR
David A. Corneth, Apr 12 2021
STATUS
approved