OFFSET
1,4
FORMULA
For n > 4: Max_{k=1..n} a(k) = ceiling(n^(1/3)) + 2 if n is a cube or a cube minus 1; Max_{k=1..n} a(k)) = ceiling(n^(1/3)) + 1 otherwise.
PROG
(PARI) a(n)=floor(n/floor(n^(1/3)+10^-20))-floor(n^(2/3)+10^-20)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Jan 30 2003
STATUS
approved