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Revision History for A042111 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A042111 Denominators of continued fraction convergents to sqrt(580).
(history; published version)
#17 by Charles R Greathouse IV at Thu Sep 08 08:44:55 EDT 2022
PROG

(MAGMAMagma) I:=[1, 12, 577, 6936]; [n le 4 select I[n] else 578*Self(n-2)-Self(n-4): n in [1..30]]; // Vincenzo Librandi, Jan 15 2014

Discussion
Thu Sep 08 08:44
OEIS Server: https://oeis.org/edit/global/2944
#16 by Charles R Greathouse IV at Sat Jun 13 00:49:39 EDT 2015
LINKS

<a href="/index/Rec">Index to sequencesentries withfor linear recurrences with constant coefficients</a>, signature (0,578,0,-1).

Discussion
Sat Jun 13 00:49
OEIS Server: https://oeis.org/edit/global/2439
#15 by Charles R Greathouse IV at Fri Jun 12 15:24:24 EDT 2015
LINKS

<a href="/index/Rea#recLCCRec">Index to sequences with linear recurrences with constant coefficients</a>, signature (0,578,0,-1).

Discussion
Fri Jun 12 15:24
OEIS Server: https://oeis.org/edit/global/2436
#14 by Michel Marcus at Wed Jan 15 01:50:34 EST 2014
STATUS

reviewed

approved

#13 by Joerg Arndt at Wed Jan 15 01:21:41 EST 2014
STATUS

proposed

reviewed

#12 by Vincenzo Librandi at Wed Jan 15 01:19:44 EST 2014
STATUS

editing

proposed

#11 by Vincenzo Librandi at Wed Jan 15 01:19:37 EST 2014
LINKS

<a href="/index/Rea#recLCC">Index to sequences with linear recurrences with constant coefficients</a>, signature (0,578,0,-1).

<a href="/index/Rea#recLCC">Index to sequences with linear recurrences with constant coefficients</a>, signature (0,578,0,-1).

#10 by Vincenzo Librandi at Wed Jan 15 01:19:09 EST 2014
LINKS

Vincenzo Librandi, <a href="/A042111/b042111.txt">Table of n, a(n) for n = 0..200</a>

FORMULA

a(n) = 578*a(n-2) - a(n-4) for n>3. - Vincenzo Librandi, Jan 15 2014

PROG

(MAGMA) I:=[1, 12, 577, 6936]; [n le 4 select I[n] else 578*Self(n-2)-Self(n-4): n in [1..30]]; // Vincenzo Librandi, Jan 15 2014

#9 by Vincenzo Librandi at Wed Jan 15 01:15:51 EST 2014
MATHEMATICA

Denominator[Convergents[Sqrt[580], 30]] (* Vincenzo Librandi, Jan 15 2014 *)

KEYWORD

nonn,cofr,frac,easy

STATUS

approved

editing

#8 by Bruno Berselli at Mon Dec 02 06:49:39 EST 2013
STATUS

proposed

approved

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Last modified August 30 23:09 EDT 2024. Contains 375550 sequences. (Running on oeis4.)