A071629 Number of terms in the set InvPhi(4*p(n)), where p(n) is the n-th prime.

5, 6, 5, 2, 3, 2, 0, 0, 3, 3, 0, 2, 3, 2, 0, 3, 0, 0, 2, 0, 2, 2, 3, 3, 2, 0, 0, 0, 0, 3, 2, 3, 0, 2, 0, 0, 0, 2, 0, 3, 3, 0, 3, 2, 0, 2, 0, 0, 0, 0, 3, 3, 0, 3, 0, 0, 0, 0, 2, 3, 0, 3, 2, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 2, 0, 0, 0, 0, 0, 2, 3, 0, 3, 2, 0, 3, 0, 0, 0, 0, 0, 0, 2, 3, 2, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1,1

Links

Donovan Johnson, Table of n, a(n) for n = 1..1000

Example

n=5:invphi(4*11);[69,92,138], a(5)=3.

Maple

[seq(nops(invphi(4*ithprime(i))), i=1..128)];

Crossrefs

Cf. A000010, A005277, A007617, A058888, A002202, A071630-A071634.

Sequence in context: A011004 A226975 A273065 * A087496 A198742 A106704

Adjacent sequences: A071626 A071627 A071628 * A071630 A071631 A071632

Keyword

nonn

Author

Labos Elemer, May 30 2002

Status

approved