login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064416 Number of integers q such that phiter(q)=n where phiter(n) = A064415(n). 2
1, 2, 5, 11, 26, 59, 137, 312, 719, 1651, 3816, 8757, 20202, 46440 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

FORMULA

If 2<=n<=6, a(n)=a(n-1)+3*a(n-2)

CROSSREFS

Cf. A000010, A064415.

Sequence in context: A159929 A291233 A026787 * A006138 A291930 A238437

Adjacent sequences:  A064413 A064414 A064415 * A064417 A064418 A064419

KEYWORD

nonn

AUTHOR

Christian WEINSBERG (cweinsbe(AT)fr.packardbell.org), Sep 30 2001

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 October 27 09:08 EDT 2020. Contains 338035 sequences. (Running on oeis4.)