A066675 a(n) = A066674(n)-1 divided by the n-th prime.

1, 2, 2, 4, 2, 4, 6, 10, 2, 2, 10, 4, 2, 4, 6, 2, 12, 6, 4, 8, 4, 4, 2, 2, 4, 6, 6, 6, 10, 2, 4, 2, 6, 4, 8, 6, 10, 4, 14, 2, 2, 6, 2, 4, 18, 4, 10, 12, 24, 12, 2, 2, 6, 2, 6, 6, 8, 6, 4, 2, 6, 2, 4, 6, 6, 26, 6, 10, 6, 10, 14, 2, 6, 4, 12, 12, 24, 6, 8, 4, 2, 10, 2, 4, 10, 2, 8, 30, 6, 12, 6, 8, 4

Offset: 1

Author

Labos Elemer, Dec 19 2001

Keywords

• nonn

Comments

Is this a duplicate of A035096? - R. J. Mathar, Dec 15 2008

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000010, A000040, A035096, A066674, A066675, A066676, A066677, A066678.

Formula

a(n) = min{m : phi(m) == 0 (mod p(n))} = min{m : A000010(m) == 0 (mod A000040(n))}.

Extensions

a(2) corrected by R. J. Mathar, Dec 15 2008