Hypotenuses for which there exist exactly 3 distinct integer triangles.

Terms

a(0) =125a(1) =250a(2) =375a(3) =500a(4) =750a(5) =875a(6) =1000a(7) =1125a(8) =1375a(9) =1500a(10) =1750a(11) =2000a(12) =2197a(13) =2250a(14) =2375a(15) =2625a(16) =2750a(17) =2875a(18) =3000a(19) =3375a(20) =3500a(21) =3875a(22) =4000a(23) =4125a(24) =4394a(25) =4500a(26) =4750a(27) =4913a(28) =5250a(29) =5375