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Revision History for A066557

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A066557

Largest n-digit multiple of n.
(history; published version)

#7 by Jon E. Schoenfield at Sun Jan 03 16:57:21 EST 2016

STATUS

editing

approved

#6 by Jon E. Schoenfield at Sun Jan 03 16:57:19 EST 2016

LINKS

Harry J. Smith, <a href="/A066557/b066557.txt">Table of n, a(n) for n = 1,...,150</a>

FORMULA

a(n) = floor((10^n-1)/n)*n.

PROG

(PARI) { for (n=1, 150, write("b066557.txt", n, " ", floor((10^n - 1)/n)*n) ) } [From _\\ _Harry J. Smith_, Feb 22 2010]

STATUS

approved

editing

#5 by N. J. A. Sloane at Thu Dec 05 19:55:05 EST 2013

AUTHOR

_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Dec 17 2001

Discussion

Thu Dec 05

19:55

OEIS Server: https://oeis.org/edit/global/2075

#4 by Russ Cox at Fri Mar 30 17:24:36 EDT 2012

PROG

(PARI) { for (n=1, 150, write("b066557.txt", n, " ", floor((10^n - 1)/n)*n) ) } [From _Harry J. Smith (hjsmithh(AT)sbcglobal.net), _, Feb 22 2010]

Discussion

Fri Mar 30

17:24

OEIS Server: https://oeis.org/edit/global/133

#3 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

Harry J. Smith, <a href="/A066557/b066557.txt">Table of n, a(n) for n=1,...,150</a>

KEYWORD

nonn,base,new

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

LINKS

Harry J. Smith, <a href="b066557.txt">Table of n, a(n) for n=1,...,150</a>

PROG

(PARI) { for (n=1, 150, write("b066557.txt", n, " ", floor((10^n - 1)/n)*n) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 22 2010]

KEYWORD

nonn,base,new

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Largest n-digit multiple of n.

DATA

9, 98, 999, 9996, 99995, 999996, 9999997, 99999992, 999999999, 9999999990, 99999999990, 999999999996, 9999999999990, 99999999999998, 999999999999990, 9999999999999984, 99999999999999990, 999999999999999990, 9999999999999999990, 99999999999999999980

OFFSET

1,1

FORMULA

a(n) = floor((10^n-1)/n)*n

CROSSREFS

Cf. A053041, A066558.

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 17 2001

EXTENSIONS

More terms and formula from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 24 2001

STATUS

approved