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A042225
Denominators of continued fraction convergents to sqrt(638).
2
1, 3, 4, 27, 58, 375, 433, 1674, 84133, 254073, 338206, 2283309, 4904824, 31712253, 36617077, 141563484, 7114791277, 21485937315, 28600728592, 193090308867, 414781346326, 2681778386823, 3096559733149, 11971457586270, 601669439046649, 1816979774726217
OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 84566, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^14 - 3*x^13 + 4*x^12 - 27*x^11 + 58*x^10 - 375*x^9 + 433*x^8 - 1674*x^7 - 433*x^6 - 375*x^5 - 58*x^4 - 27*x^3 - 4*x^2 - 3*x - 1) / (x^16 - 84566*x^8 + 1). - Colin Barker, Dec 04 2013
MATHEMATICA
Denominator[Convergents[Sqrt[638], 30]] (* Vincenzo Librandi, Jan 17 2014 *)
CROSSREFS
Sequence in context: A041021 A041022 A157163 * A094084 A362887 A367388
KEYWORD
nonn,frac,easy
EXTENSIONS
More terms from Colin Barker, Dec 04 2013
STATUS
approved