OFFSET
0,2
COMMENTS
10^18 < a(4) < 10^19. - Daniel Suteu, Nov 17 2020
LINKS
Chris K. Caldwell and G. L. Honaker, Jr., Prime Curio for 455
Eric Weisstein's World of Mathematics, Distinct Prime Factors.
EXAMPLE
a(2) = 455 because the average number of distinct prime divisors of {1..455} is >= 2.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ilya Gutkovskiy, Nov 17 2020
STATUS
approved