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A042537 Denominators of continued fraction convergents to sqrt(797). 2
1, 4, 13, 173, 186, 917, 3854, 4771, 65877, 202402, 875485, 49229562, 197793733, 642610761, 8551733626, 9194344387, 45329111174, 190510789083, 235839900257, 3256429492424, 10005128377529, 43276943002540, 2433513936519769, 9777332689081616 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 49431964, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
FORMULA
a(n) = 49431964*a(n-11) + a(n-22) for n>21. - Vincenzo Librandi, Jan 23 2014
MATHEMATICA
Denominator[Convergents[Sqrt[797], 30]] (* Harvey P. Dale, Sep 30 2012 *)
PROG
(Magma) I:=[1, 4, 13, 173, 186, 917, 3854, 4771, 65877, 202402, 875485, 49229562, 197793733, 642610761, 8551733626, 9194344387, 45329111174, 190510789083, 235839900257, 3256429492424, 10005128377529, 43276943002540]; [n le 22 select I[n] else 49431964*Self(n-11)+Self(n-22): n in [1..30]]; // Vincenzo Librandi, Jan 23 2014
CROSSREFS
Sequence in context: A203215 A198159 A322659 * A220038 A132512 A203221
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Jan 23 2014
STATUS
approved

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Last modified May 25 12:29 EDT 2024. Contains 372788 sequences. (Running on oeis4.)