OFFSET
0,4
LINKS
R. Zumkeller, Table of n, a(n) for n = 0..500
EXAMPLE
a(3) = #{27-4, 27-16, 27-25} = #{23, 11, 2} = 3;
a(4) = #{} = 0;
a(5) = #{125-16, 125-36, 125-64} = #{109, 89, 61} = 3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Oct 31 2009
STATUS
approved