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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A054616 Sum_{d|n} phi(d)*9^(n/d). 0
0, 9, 90, 747, 6660, 59085, 532350, 4783023, 43053480, 387422001, 3486843810, 31381059699, 282430082700, 2541865828437, 22876797238470, 205891132215735, 1853020231912080, 16677181699666713, 150094635685484490, 1350851717672992251 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A044641 A165135 A180289 * A052386 A186510 A158609

Adjacent sequences:  A054613 A054614 A054615 * A054617 A054618 A054619

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Apr 16 2000

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 16:00 EST 2012. Contains 205938 sequences.