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A041489 Denominators of continued fraction convergents to sqrt(261). 2
1, 6, 13, 45, 328, 373, 1447, 1820, 5087, 6907, 25808, 32715, 254813, 797154, 1849121, 11891880, 382389281, 2306227566, 4994844413, 17290760805, 126030170048, 143320930853, 555992962607, 699313893460, 1954620749527, 2653934642987, 9916424678488, 12570359321475 (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, 0, 0, 0, 0, 0, 384238402, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
a(n) = 384238402*a(n-16) - a(n-32) for n>31. [Bruno Berselli, Dec 18 2013]
MATHEMATICA
Denominator[Convergents[Sqrt[261], 30]] (* Vincenzo Librandi, Dec 18 2013 *)
CROSSREFS
Cf. A041488.
Sequence in context: A034753 A100905 A353964 * A239530 A131188 A247939
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Dec 18 2013
STATUS
approved

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Last modified July 13 02:13 EDT 2024. Contains 374259 sequences. (Running on oeis4.)