login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071629 Number of terms in the set InvPhi(4*p(n)), where p(n) is the n-th prime. 7
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 (list; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 16 12:39 EDT 2019. Contains 327112 sequences. (Running on oeis4.)