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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110805 Sum of digits of n times number of digits of n. 2
1, 2, 3, 4, 5, 6, 7, 8, 9, 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..69.

EXAMPLE

a(19) = 2 * (1 + 9) = 20.

a(1235) = 4 * (1 + 2 + 3 + 5) = 44.

MATHEMATICA

Table[IntegerLength[n] * Total[IntegerDigits[n]], {n, 50}] (* Harvey P. Dale, Jul 31 2012 *)

CROSSREFS

Sequence in context: A125959 A043269 A122481 * A061499 A178051 A245346

Adjacent sequences:  A110802 A110803 A110804 * A110806 A110807 A110808

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 14 2005

STATUS

approved

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

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

Last modified November 28 05:47 EST 2014. Contains 250286 sequences.