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A110803 n times the number of digits in the decimal expansion of n. 2

%I

%S 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,

%T 54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,

%U 100,102

%N n times the number of digits in the decimal expansion of n.

%H Indranil Ghosh, <a href="/A110803/b110803.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = n * A055642(n). - _Indranil Ghosh_, Jan 11 2017

%e a(1234) = 4936 = 1234*4.

%t # IntegerLength[#]&/@Range[60] (* _Harvey P. Dale_, Mar 04 2011 *)

%o (Python)

%o def A110803(n):

%o return n*len(str(n)) # _Indranil Ghosh_, Jan 11 2017

%Y Cf. A055642.

%K base,easy,nonn

%O 1,2

%A _Amarnath Murthy_, Aug 14 2005

%E Corrected by _T. D. Noe_, Oct 25 2006

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Last modified June 16 11:58 EDT 2021. Contains 345057 sequences. (Running on oeis4.)