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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 Harvey P. Dale, 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, 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 Cf. A042890, A040945. Sequence in context: A078504 A066090 A251259 * A032835 A102920 A064335 Adjacent sequences:  A042888 A042889 A042890 * A042892 A042893 A042894 KEYWORD nonn,frac,easy AUTHOR STATUS approved

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Last modified October 15 01:40 EDT 2019. Contains 328025 sequences. (Running on oeis4.)