OFFSET
1,2
COMMENTS
This is the area of the triangle with vertices (1,p), (p,q), (q,pq).
A200050 gives the record values. [Arkadiusz Wesolowski, Apr 18 2012]
EXAMPLE
For p*q=3*5=15, |(3^2 + 5^2 - 5*(3^2 +1))/2| = 8
CROSSREFS
KEYWORD
nonn
AUTHOR
J. M. Bergot, Jul 04 2011
EXTENSIONS
Definition simplified by N. J. A. Sloane, Jul 10 2011
STATUS
approved