A066420 Least m such that card(invphi(phi(m)))=n.

1, 3, 5, 15, 13, 51, 37, 41, 35, 65, 187, 397, 2269, 1059, 313, 73, 337, 247, 937, 185, 689, 1139, 2057, 403, 2827, 485, 323, 1321, 3697, 241, 769, 9001, 433, 7129, 4201, 527, 577, 1297, 1201, 15937, 3313, 3281, 3379, 949, 3121, 7519, 3889, 779, 1763

Offset: 2

Author

Vladeta Jovovic, Dec 25 2001

Keywords

• nonn

Links

• T. D. Noe, Table of n, a(n) for n = 2..1023

Crossrefs

Cf. A049283, A007374.

Cf. A224531, A224532.

Formula

a(n) = A049283(A007374(n)). - Max Alekseyev, Apr 12 2005

Extensions

More terms from Max Alekseyev, Apr 12 2005