OFFSET
1,2
LINKS
Carmine Suriano, Table of n, a(n) for n = 1..1500
EXAMPLE
a(20)=156 since 6^2-5^2+1^2=12 divides 156.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Carmine Suriano, May 04 2013
STATUS
approved