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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A169805 Twice the sum of the digits of n. 1
0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 14, 16, 18, 20, 22, 24, 26 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The only n such that a(n) = n are 0 and 18.

LINKS

Table of n, a(n) for n=0..76.

Erich Friedman, What's Special About This Number?

FORMULA

a(n) = 2*A007953(n).

CROSSREFS

Cf. A007953.

Sequence in context: A136614 A245627 A097586 * A263042 A230099 A098727

Adjacent sequences:  A169802 A169803 A169804 * A169806 A169807 A169808

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, May 24 2010

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 26 12:00 EDT 2019. Contains 322472 sequences. (Running on oeis4.)