OFFSET
1,1
COMMENTS
Considering the set of primitive Pythagorean triangles with sides (A, B, C), the sequence gives the values (A+B+C)*(A*B*C), in increasing order.
It is a challenge to find a pair of primitive Pythagorean triangles such that product of perimeter and the sides is equal.
LINKS
Wikipedia, Pythagorean Triples
EXAMPLE
a(1) = (3+4+5)*(3*4*5) = 720.
a(2) = (5+12+13)*(5*12*13) = 23400.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mihir Mathur, Apr 02 2013
EXTENSIONS
Corrected and extended by Giovanni Resta, Apr 03 2013
STATUS
approved