This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A041405 Denominators of continued fraction convergents to sqrt(217). 2
 1, 1, 3, 4, 11, 15, 26, 249, 1022, 9447, 10469, 19916, 50301, 70217, 190735, 260952, 7497391, 7758343, 23014077, 30772420, 84558917, 115331337, 199890254, 1914343623, 7857264746, 72629726337 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7688126, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1). FORMULA a(n) = 7688126*a(n-16) - a(n-32) for n>31. [Bruno Berselli, Dec 18 2013] MATHEMATICA Denominator[Convergents[Sqrt[217], 30]] (* Harvey P. Dale, Mar 20 2012 *) CROSSREFS Cf. A041404. Sequence in context: A249650 A114951 A085368 * A042483 A002530 A042709 Adjacent sequences:  A041402 A041403 A041404 * A041406 A041407 A041408 KEYWORD nonn,frac,easy AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 18 22:11 EDT 2019. Contains 321305 sequences. (Running on oeis4.)