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A042270
Numerators of continued fraction convergents to sqrt(661).
2
25, 26, 77, 180, 797, 3368, 54685, 58053, 577162, 1212377, 1789539, 22686845, 115223764, 137910609, 253134373, 391044982, 1035224337, 1426269319, 5314032294, 6740301613, 12054333907, 42903303334
OFFSET
0,1
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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5730908870845166436, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
FORMULA
a(n) = 5730908870845166436*a(n-39) + a(n-78) for n>77. [Bruno Berselli, Nov 22 2013]
MATHEMATICA
Numerator[Convergents[Sqrt[661], 30]] (* Vincenzo Librandi, Nov 20 2013 *)
CROSSREFS
Cf. A042271.
Sequence in context: A042250 A042272 A042274 * A042268 A042266 A042278
KEYWORD
nonn,cofr,frac,easy
AUTHOR
STATUS
approved