The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A173484 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A173484

a(n) = the smallest number ending in n+1 zeros divisible by n.
(history; published version)

#8 by Bruno Berselli at Thu Jun 28 04:49:54 EDT 2018

STATUS

reviewed

approved

#7 by Joerg Arndt at Thu Jun 28 04:15:11 EDT 2018

STATUS

proposed

reviewed

#6 by Bruno Berselli at Thu Jun 28 02:50:02 EDT 2018

STATUS

editing

proposed

#5 by Bruno Berselli at Thu Jun 28 02:49:59 EDT 2018

KEYWORD

nonn,base,changed

STATUS

proposed

editing

#4 by Robert Israel at Thu Jun 28 01:54:51 EDT 2018

STATUS

editing

proposed

Discussion

Thu Jun 28

01:58

Michel Marcus: Kwd base ?

#3 by Robert Israel at Thu Jun 28 01:54:36 EDT 2018

LINKS

Robert Israel, <a href="/A173484/b173484.txt">Table of n, a(n) for n = 1..995</a>

FORMULA

a(n) = 10^(n+1)*A132740(n). - Robert Israel, Jun 28 2018

MAPLE

f:= n -> 10^(n+1)*n/2^padic:-ordp(n, 2)/5^padic:-ordp(n, 5):

map(f, [$1..30]); # Robert Israel, Jun 28 2018

CROSSREFS

Cf. A132740.

STATUS

approved

editing

#2 by Russ Cox at Fri Mar 30 19:00:22 EDT 2012

AUTHOR

_Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), _, Mar 04 2010

Discussion

Fri Mar 30

19:00

OEIS Server: https://oeis.org/edit/global/299

#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

a(n) = the smallest number ending in n+1 zeros divisible by n.

DATA

100, 1000, 30000, 100000, 1000000, 30000000, 700000000, 1000000000, 90000000000, 100000000000, 11000000000000, 30000000000000, 1300000000000000, 7000000000000000, 30000000000000000

OFFSET

1,1

COMMENTS

See A173478 - A173486.

KEYWORD

nonn

AUTHOR

Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Mar 04 2010

STATUS

approved