The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A067806 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A067806

Numbers n such that sigma(n+1)+sigma(n)=3n.
(history; published version)

#14 by N. J. A. Sloane at Tue Jun 24 01:08:22 EDT 2014

EXTENSIONS

Edited by _Dean Hickerson (dean.hickerson(AT)yahoo.com), _, Feb 16 2002

Discussion

Tue Jun 24

01:08

OEIS Server: https://oeis.org/edit/global/2238

#13 by Bruno Berselli at Thu Jul 11 10:03:58 EDT 2013

STATUS

proposed

approved

#12 by Giovanni Resta at Thu Jul 11 09:55:17 EDT 2013

STATUS

editing

proposed

#11 by Giovanni Resta at Thu Jul 11 09:52:05 EDT 2013

DATA

10, 34, 136, 169, 2402, 5329, 21004, 41164, 54722, 1060802, 5026562, 10800112, 11108164, 14366402, 87026656, 102944992, 10499710072, 107000850688, 220200311872, 924354816004

COMMENTS

a(21) > 10^13. - Giovanni Resta, Jul 11 2013

EXTENSIONS

a(18)-a(20) from Giovanni Resta, Jul 11 2013

STATUS

approved

editing

#10 by Russ Cox at Fri Mar 30 18:38:51 EDT 2012

AUTHOR

_Benoit Cloitre (benoit7848c(AT)orange.fr), _, Feb 07 2002

Discussion

Fri Mar 30

18:38

OEIS Server: https://oeis.org/edit/global/216

#9 by Russ Cox at Fri Mar 30 17:34:49 EDT 2012

EXTENSIONS

a(17) from _Donovan Johnson (donovan.johnson(AT)yahoo.com), _, Jan 31 2009

Discussion

Fri Mar 30

17:34

OEIS Server: https://oeis.org/edit/global/163

#8 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

DATA

10, 34, 136, 169, 2402, 5329, 21004, 41164, 54722, 1060802, 5026562, 10800112, 11108164, 14366402, 87026656, 102944992, 10499710072

EXTENSIONS

a(17) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Jan 31 2009

#7 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

KEYWORD

more,nonn,new

EXTENSIONS

Edited by Dean Hickerson (dean.hickerson(AT)math.ucdavisyahoo.educom), Feb 16 2002

#6 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008

KEYWORD

more,nonn,new

AUTHOR

Benoit Cloitre (abmtbenoit7848c(AT)wanadooorange.fr), Feb 07 2002

#5 by N. J. A. Sloane at Fri Feb 24 03:00:00 EST 2006

MATHEMATICA

For[n=1, True, n++, If[DivisorSigma[1, n]+DivisorSigma[1, n+1]==3n, Print[n]]]

KEYWORD

more,nonn,new