A042743 Denominators of continued fraction convergents to sqrt(902).

1, 30, 1801, 54060, 3245401, 97416090, 5848210801, 175543740120, 10538472618001, 316329722280150, 18990321809427001, 570025984005090180, 34220549362114837801, 1027186506847450224210, 61665410960209128290401, 1850989515313121298936240

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (0,1802,0,-1).

Formula

G.f.: -(x^2-30*x-1) / (x^4-1802*x^2+1). - Colin Barker, Dec 22 2013

Mathematica

Denominator[Convergents[Sqrt[902], 30]] (* Vincenzo Librandi, Jan 28 2014 *)

Crossrefs

Cf. A042742, A040871.

Sequence in context: A108298 A202384 A202369 * A042740 A367392 A282126

Adjacent sequences: A042740 A042741 A042742 * A042744 A042745 A042746

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

Additional term from Colin Barker, Dec 22 2013

Status

approved