Squares of the form k^2+(k+17)^2 with integer k.

Terms

a(0) =169a(1) =289a(2) =625a(3) =2809a(4) =7225a(5) =18769a(6) =93025a(7) =243049a(8) =635209a(9) =3157729a(10) =8254129a(11) =21576025a(12) =107267449a(13) =280395025a(14) =732947329a(15) =3643933225a(16) =9525174409a(17) =24898630849a(18) =123786459889a(19) =323575532569a(20) =845820499225