A042501 Denominators of continued fraction convergents to sqrt(778).

1, 1, 9, 28, 149, 177, 1388, 9893, 11281, 66298, 210175, 1747698, 1957873, 107472840, 109430713, 982918544, 3058186345, 16273850269, 19332036614, 151598106567, 1080518782583, 1232116889150, 7241103228333, 22955426574149, 190884515821525, 213839942395674

Offset

0,3

Links

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

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 109220538, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

Formula

a(n) = 109220538*a(n-13) + a(n-26) for n>25. - Vincenzo Librandi, Jan 23 2014

Mathematica

Denominator[Convergents[Sqrt[778], 30]] (* Vincenzo Librandi, Jan 23 2014 *)

Crossrefs

Cf. A040750, A042500.

Sequence in context: A181090 A073706 A226976 * A271185 A306843 A277511

Adjacent sequences: A042498 A042499 A042500 * A042502 A042503 A042504

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Jan 23 2014

Status

approved