A041335 Denominators of continued fraction convergents to sqrt(181).

1, 2, 9, 11, 97, 593, 690, 1283, 1973, 3256, 8485, 20226, 28711, 48937, 77648, 126585, 837158, 6823849, 7661007, 37467877, 82596761, 2184983663, 4452564087, 19995240011, 24447804098, 215577672795, 1317913840868, 1533491513663, 2851405354531, 4384896868194

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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2222451540, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

Formula

a(n) = 2222451540*a(n-21) + a(n-42) for n>41. [Bruno Berselli, Dec 16 2013]

Mathematica

Denominator[Convergents[Sqrt[181], 30]] (* Vincenzo Librandi, Dec 15 2013 *)

Crossrefs

Cf. A041334.

Sequence in context: A041651 A042687 A083159 * A042147 A090517 A092191

Adjacent sequences: A041332 A041333 A041334 * A041336 A041337 A041338

Keyword

nonn,frac,easy

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Dec 15 2013

Status

approved