Previous name was: "Ordered hypotenuses of imprimitive Pythagorean triangles. Imprimitive analog of A020882."

Let b > a > 0 be integers. Then (b^2 - a^2, 2*b*a, b^2 + a^2) is a Pythagorean triple. This sequence lists the ordered values of b^2 + a^2 including duplicates. Once the missing 20 is included, this becomes a duplicate of A024507. - Michael Somos, Nov 22 2019