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A110803 n times the number of digits in the decimal expansion of n. 2
1, 2, 3, 4, 5, 6, 7, 8, 9, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Indranil Ghosh, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = n * A055642(n). - Indranil Ghosh, Jan 11 2017

EXAMPLE

a(1234) = 4936 = 1234*4.

MATHEMATICA

# IntegerLength[#]&/@Range[60]  (* Harvey P. Dale, Mar 04 2011 *)

PROG

(Python)

def A110803(n):

     return n*len(str(n)) # Indranil Ghosh, Jan 11 2017

CROSSREFS

Cf. A055642.

Sequence in context: A039077 A247803 A052383 * A109795 A248500 A250041

Adjacent sequences:  A110800 A110801 A110802 * A110804 A110805 A110806

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 14 2005

EXTENSIONS

Corrected by T. D. Noe, Oct 25 2006

STATUS

approved

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Last modified May 9 06:30 EDT 2021. Contains 343692 sequences. (Running on oeis4.)