A042257 Denominators of continued fraction convergents to sqrt(654).

1, 1, 2, 5, 7, 68, 75, 143, 2363, 2506, 4869, 46327, 51196, 148719, 199915, 348634, 17631615, 17980249, 35611864, 89203977, 124815841, 1212546546, 1337362387, 2549908933, 42135905315, 44685814248, 86821719563, 826081290315, 912903009878, 2651887310071

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, 0, 0, 0, 17831530, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

Formula

a(n) = 17831530*a(n-16) - a(n-32) for n>31. - Vincenzo Librandi, Jan 19 2014

Mathematica

Denominator[Convergents[Sqrt[654], 30]] (* Vincenzo Librandi, Jan 19 2014 *)

Crossrefs

Cf. A042256.

Sequence in context: A358381 A041125 A293592 * A343833 A103056 A041445

Adjacent sequences: A042254 A042255 A042256 * A042258 A042259 A042260

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Jan 19 2014

Status

approved