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A042891 Denominators of continued fraction convergents to sqrt(977). 2
1, 3, 4, 35, 179, 214, 393, 1393, 10144, 11537, 21681, 163304, 511593, 674897, 1186490, 6607347, 54045266, 60652613, 236003105, 14692845123, 44314538474, 59007383597, 516373607250, 2640875419847, 3157249027097 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
The Hankel transform (see A001906 for definition) of this sequence forms the sequence A047656(n+1)= [1,3,27,729,59049,14348907,...] . - Philippe Deléham, Aug 29 2006
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, 0, 0, 0, 14753497736, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
FORMULA
The Hankel transform (see A001906 for definition) of this sequence forms the sequence A047656(n+1)= [1,3,27,729,59049,14348907,...]. - Philippe Deléham, Aug 29 2006
a(n) = 14753497736*a(n-19) - a(n-38) for n > 37. - Vincenzo Librandi, Jan 31 2014
MATHEMATICA
Denominator[Convergents[Sqrt[977], 40]] (* Harvey P. Dale, May 09 2012 *)
CROSSREFS
Sequence in context: A078504 A066090 A251259 * A032835 A102920 A064335
KEYWORD
nonn,frac,easy
AUTHOR
STATUS
approved

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Last modified April 14 04:54 EDT 2024. Contains 371655 sequences. (Running on oeis4.)