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A110804 a(1) = 10, a(n) = a(n-1) times the number of digits in a(n-1). 0
10, 20, 40, 80, 160, 480, 1440, 5760, 23040, 115200, 691200, 4147200, 29030400, 232243200, 2090188800, 20901888000, 229920768000, 2759049216000, 35867639808000, 502146957312000, 7532204359680000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For every n there is a least number k such that n! divides a(m) for all m > k. Subsidiary sequence: least k such that n! divides a(k).

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Next term after 160 is 160*3 = 480.

MATHEMATICA

NestList[# IntegerLength[#] &, 10, 20] (* Harvey P. Dale, Feb 04 2011 *)

CROSSREFS

Sequence in context: A013978 A241608 A053162 * A048063 A007927 A284991

Adjacent sequences:  A110801 A110802 A110803 * A110805 A110806 A110807

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 14 2005

EXTENSIONS

More terms from Harvey P. Dale, Feb 04 2011

STATUS

approved

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Last modified June 16 13:05 EDT 2021. Contains 345057 sequences. (Running on oeis4.)