OFFSET
0,3
COMMENTS
a(n)=0 iff n = m^(6*k).
EXAMPLE
A077110(20)=343=7^3 is the nearest cube to 20^2=400, therefore a(20)=343-400=-57.
CROSSREFS
KEYWORD
sign
AUTHOR
Reinhard Zumkeller, Oct 29 2002
STATUS
approved