OFFSET
1,1
COMMENTS
a(6) is greater than 50000000. - Tanya Khovanova & Alexey Radul, Jul 30 2006
a(8) > 10^13. - Donovan Johnson, Jan 31 2009
EXAMPLE
Consider a(3): 98 = 2*7*7 (3 prime divisors), 99 = 3*3*11 (3 prime divisors), 100 = 2*2*5*5 (4 prime divisors). Hence 98 starts a consecutive block of 3 numbers with at least 3 prime divisors each. 98 is the smallest such number.
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Tanya Khovanova & Alexey Radul, Jul 28 2006
EXTENSIONS
a(6) from Donovan Johnson, Apr 07 2008
a(7) from Donovan Johnson, Jan 31 2009
STATUS
approved