OFFSET
0,3
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..10000
FORMULA
a(n) < 4 log_2(n) for n > 1. - Charles R Greathouse IV, Aug 08 2013
PROG
(PARI) rad(n)=my(f=factor(n)[, 1]); prod(i=1, #f, f[i])
a(n)=if(n<4, n, 1+a(rad(n)-1)) \\ Charles R Greathouse IV, Aug 08 2013
(Haskell)
a110157 n = genericIndex a110157_list (n-1)
a110157_list = 0 : map ((+ 1) . a110157 . (+ 1)) a075423_list
-- Reinhard Zumkeller, Aug 14 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 14 2005
STATUS
approved