The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A025629 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A025629

Numbers of form 6^i*10^j with i, j >= 0.
(history; published version)

#12 by Vaclav Kotesovec at Sat Sep 26 03:54:20 EDT 2020

STATUS

editing

approved

#11 by Vaclav Kotesovec at Sat Sep 26 03:54:15 EDT 2020

FORMULA

a(n) ~ exp(sqrt(2*log(6)*log(10)*n)) / sqrt(60). - Vaclav Kotesovec, Sep 26 2020

STATUS

reviewed

editing

#10 by Michel Marcus at Sat Sep 26 03:44:26 EDT 2020

STATUS

proposed

reviewed

#9 by Amiram Eldar at Sat Sep 26 03:30:17 EDT 2020

STATUS

editing

proposed

#8 by Amiram Eldar at Sat Sep 26 03:15:38 EDT 2020

LINKS

Amiram Eldar, <a href="/A025629/b025629.txt">Table of n, a(n) for n = 1..10000</a>

FORMULA

Sum_{n>=1} 1/a(n) = (6*10)/((6-1)*(10-1)) = 4/3. - Amiram Eldar, Sep 26 2020

MATHEMATICA

n = 10^6; Flatten[Table[6^i*10^j, {i, 0, Log[6, n]}, {j, 0, Log10[n/6^i]}]] // Sort (* Amiram Eldar, Sep 26 2020 *)

CROSSREFS

Cf. A025610, A025618, A025622, A025626, A025627, A025628.

Cf. A025612, A025616, A025621, A025625, A025632, A025634.

STATUS

approved

editing

#7 by Charles R Greathouse IV at Wed Jan 10 12:30:46 EST 2018

STATUS

editing

approved

#6 by Charles R Greathouse IV at Wed Jan 10 12:30:44 EST 2018

PROG

(PARI) list(lim)=my(v=List(), N); for(n=0, logint(lim\=1, 10), N=10^n; while(N<=lim, listput(v, N); N*=6)); Set(v) \\ Charles R Greathouse IV, Jan 10 2018

STATUS

approved

editing

#5 by Russ Cox at Fri Mar 30 18:35:26 EDT 2012

AUTHOR

_David W. Wilson (davidwwilson(AT)comcast.net)_

Discussion

Fri Mar 30

18:35

OEIS Server: https://oeis.org/edit/global/202

#4 by N. J. A. Sloane at Sat Sep 13 03:00:00 EDT 2003

KEYWORD

easy,nonn,new

AUTHOR

David W. Wilson (davidwwilson(AT)attbicomcast.comnet)

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

KEYWORD

easy,nonn,new

AUTHOR

dww

David W. Wilson (davidwwilson(AT)attbi.com)