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URL: https://oeis.org/A041369

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A041369
Denominators of continued fraction convergents to sqrt(199).
2
1, 9, 19, 28, 75, 178, 965, 4038, 5003, 9041, 122536, 131577, 254113, 1148029, 5994258, 13136545, 32267348, 45403893, 123075134, 1153080099, 32409317906, 292836941253, 618083200412, 910920141665, 2439923483742, 5790767109149, 31393759029487
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, 0, 0, 0, 0, 32532393040, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
a(n) = 32532393040*a(n-20) - a(n-40) for n>39. [Bruno Berselli, Dec 16 2013]
MATHEMATICA
Denominator/@Convergents[Sqrt[199], 40] (* Harvey P. Dale, Mar 14 2011 *)
CROSSREFS
Cf. A041368.
Sequence in context: A090065 A098791 A041156 * A042523 A347421 A037085
KEYWORD
nonn,frac,easy
EXTENSIONS
More terms from Vincenzo Librandi, Dec 16 2013
STATUS
approved