The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A076899 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A076899

Let u(1)=u(2)=u(3)=1, u(n)=sign(u(n-1)-u(n-2))/(u(n-3)+1); then a(n) is the denominator of u(n).
(history; published version)

#11 by Michel Marcus at Tue Oct 14 08:26:10 EDT 2014

STATUS

reviewed

approved

#10 by Joerg Arndt at Tue Oct 14 08:13:45 EDT 2014

STATUS

proposed

reviewed

#9 by Michel Marcus at Tue Oct 14 07:44:13 EDT 2014

STATUS

editing

proposed

#8 by Michel Marcus at Tue Oct 14 07:43:55 EDT 2014

CROSSREFS

Cf. A076898 (numerators).

STATUS

proposed

editing

Discussion

Tue Oct 14

07:44

Michel Marcus: yes !

#7 by Colin Barker at Tue Oct 14 07:16:50 EDT 2014

STATUS

editing

proposed

#6 by Colin Barker at Tue Oct 14 07:16:07 EDT 2014

FORMULA

F(k) denotes the k-th Fibonacci number: a(6k)=F(k+2); a(6k+1)=1; a(6k+2)=a(6k+3)=F(k+1); a(6k+4)=1; a(6k+5)=F(k+3).

Empirical g.f.: -x*(x^14+x^13+x^12-x^11-x^10+2*x^8+2*x^7+x^6-x^5-x^4-x^2-x-1) / ((x-1)*(x^2+x+1)*(x^12+x^6-1)). - Colin Barker, Oct 14 2014

CROSSREFS

Cf. A076898.

STATUS

approved

editing

Discussion

Tue Oct 14

07:16

Colin Barker: Added xref.

#5 by Russ Cox at Fri Mar 30 18:39:10 EDT 2012

AUTHOR

_Benoit Cloitre (benoit7848c(AT)orange.fr), _, Nov 26 2002

Discussion

Fri Mar 30

18:39

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

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

KEYWORD

frac,nonn,new

AUTHOR

Benoit Cloitre (abmtbenoit7848c(AT)wanadooorange.fr), Nov 26 2002

#3 by N. J. A. Sloane at Wed Sep 21 03:00:00 EDT 2005

KEYWORD

frac,nonn,new

AUTHOR

Benoit Cloitre (abcloitreabmt(AT)modulonetwanadoo.fr), Nov 26 2002

#2 by N. J. A. Sloane at Tue Jul 19 03:00:00 EDT 2005

KEYWORD

frac,nonn,new

AUTHOR

Benoit Cloitre (abcloitre(AT)wanadoomodulonet.fr), Nov 26 2002