OFFSET
1,8
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
EXAMPLE
a(18) = 3 since 18 is a factor of 6!, 9 is the largest prime power factor of 18 and 9-6=3.
PROG
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Henry Bottomley, Aug 08 2000
EXTENSIONS
More terms added and term a(90) corrected from 4 to 3 by Antti Karttunen, Jul 22 2018
STATUS
approved