The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A041793 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A041793

Denominators of continued fraction convergents to sqrt(417).
(history; published version)

#12 by Ray Chandler at Mon Jul 17 01:08:27 EDT 2023

STATUS

editing

approved

#11 by Ray Chandler at Mon Jul 17 01:08:22 EDT 2023

LINKS

<a href="/index/Rec#order_36">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 170645294, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

#10 by Ray Chandler at Mon Jul 17 01:08:07 EDT 2023

LINKS

#9 by Ray Chandler at Mon Jul 17 01:08:07 EDT 2023

LINKS

STATUS

approved

editing

#8 by Bruno Berselli at Wed Dec 25 02:10:56 EST 2013

STATUS

reviewed

approved

#7 by Bruno Berselli at Tue Dec 24 12:39:13 EST 2013

STATUS

proposed

reviewed

#6 by Vincenzo Librandi at Tue Dec 24 11:49:46 EST 2013

STATUS

editing

proposed

#5 by Vincenzo Librandi at Tue Dec 24 11:49:29 EST 2013

DATA

1, 2, 5, 7, 12, 19, 107, 447, 554, 7095, 7649, 37691, 196104, 233795, 429899, 663694, 1757287, 4178268, 168888007, 341954282, 852796571, 1194750853, 2047547424, 3242298277, 18259038809, 76278453513, 94537492322, 1210728361377, 1305265853699, 6431791776173

LINKS

Vincenzo Librandi, <a href="/A041793/b041793.txt">Table of n, a(n) for n = 0..200</a>

FORMULA

a(n) = 170645294*a(n-18) - a(n-36) for n>35. - Vincenzo Librandi, Dec 24 2013

MATHEMATICA

Denominator[Convergents[Sqrt[417], 30]] (* Vincenzo Librandi, Dec 24 2013 *)

KEYWORD

nonn,cofr,frac,easy

EXTENSIONS

More terms from Vincenzo Librandi, Dec 24 2013

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 16:48:09 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com)_.

Discussion

Fri Mar 30

16:48

OEIS Server: https://oeis.org/edit/global/110

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

KEYWORD

nonn,cofr,easy,new

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).