OFFSET
1,1
COMMENTS
Also numbers having at least one prime factor greater than twice the smallest prime factor: complement of A081306; A081303(a(n)) > 0. - Reinhard Zumkeller, Mar 17 2003
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..10000
FORMULA
A069897(n) = floor(P/p) > 1, where P is the largest, p is the least prime-factor of n.
EXAMPLE
Composites with at least two and sufficiently deviating prime factors are here, like 2q, where q = prime >= 5: {10,...,254}. Numbers with such divisors like 30 are also included.
MATHEMATICA
Select[Range@ 120, #[[-1]] > 2 #[[1]] &@ FactorInteger[#][[All, 1]] &] (* Michael De Vlieger, Dec 08 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Apr 10 2002
EXTENSIONS
More terms from Reinhard Zumkeller, Mar 17 2003
STATUS
approved