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!)
A139412 Numbers n such that phi(n)=10^phi(d_1)+10^phi(d_2)+...+10^phi(d_k) where d_1d_2...d_k is the decimal expansion of n. 1
231, 34386, 3775375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

phi(3775375)=10^phi(3)+10^phi(7)+10^phi(7)+10^phi(5)+10^phi(3)+

10^phi(7)+10^phi(5).

CROSSREFS

Cf. A139411, A139413.

Sequence in context: A201957 A152500 A066370 * A027551 A172861 A068750

Adjacent sequences:  A139409 A139410 A139411 * A139413 A139414 A139415

KEYWORD

base,nonn,bref

AUTHOR

Farideh Firoozbakht, May 11 2008

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 April 19 05:26 EDT 2021. Contains 343105 sequences. (Running on oeis4.)