OFFSET
1,1
EXAMPLE
Triangular 91 and triangular 325 form a Pythagorean triple {325, 91, 312}.
PROG
(PARI) {for(i=1, 10^3, k=i+1; v=1; a=i*(i+1)/2; while(k<i*i&&v, b=k*(k+1)/2; if(issquare(b*b-a*a), v=0; print1(a, ", ")); k+=1))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Antonio Roldán, Feb 28 2013
STATUS
approved