Numbers n which are the hypotenuse of a Pythagorean triple with n' as a leg, where n' is the arithmetic derivative of n.

A211176

Numbers n which are the hypotenuse of a Pythagorean triple with n' as a leg, where n' is the arithmetic derivative of n.

Terms

    a(0) =125a(1) =625a(2) =23125a(3) =142805a(4) =210125a(5) =371293a(6) =7983625a(7) =9370805a(8) =25757525a(9) =50062025a(10) =120670225a(11) =489766225a(12) =881052625a(13) =1471596725a(14) =2307267625a(15) =2489771125a(16) =3145529225a(17) =3474871553a(18) =6975757441a(19) =7977558641

External references