OFFSET
1,1
COMMENTS
a(A074981) = 0.
LINKS
Eric Weisstein's World of Mathematics, Perfect Power.
EXAMPLE
a(30) = 6889: 30 = 83^2 - 19^3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Oct 10 2002
STATUS
approved