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A041335
Denominators of continued fraction convergents to sqrt(181).
2
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
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
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Dec 15 2013
STATUS
approved