A110803 n times the number of digits in the decimal expansion of n.

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, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128

Offset: 1

Author

Amarnath Murthy, Aug 14 2005

Keywords

• base
• easy
• nonn

Examples

			a(1234) = 4936 = 1234*4.
		

Links

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

Crossrefs

Cf. A055642.

Programs

Mathematica

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

Python

def A110803(n):
     return n*len(str(n)) # Indranil Ghosh, Jan 11 2017

Formula

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

Extensions

Corrected by T. D. Noe, Oct 25 2006