Numbers k>0 such that k' = (k-1)' + (k-2)', where k' is the arithmetic derivative of k.

A276701

Numbers k>0 such that k' = (k-1)' + (k-2)', where k' is the arithmetic derivative of k.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =20259a(4) =43912a(5) =563103a(6) =18895035a(7) =119847148a(8) =305478634710

External references