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A041919
Denominators of continued fraction convergents to sqrt(481).
2
1, 1, 14, 15, 29, 44, 205, 864, 1069, 1933, 3002, 40959, 43961, 1887321, 1931282, 26993987, 28925269, 55919256, 84844525, 395297356, 1666033949, 2061331305, 3727365254, 5788696559, 78980420521, 84769117080, 3639283337881, 3724052454961, 52051965252374
OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1928280, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
FORMULA
a(n) = 1928280*a(n-13) + a(n-26) for n>25. - Vincenzo Librandi, Dec 27 2013
MATHEMATICA
Denominator[Convergents[Sqrt[481], 40]] (* Harvey P. Dale, Mar 31 2012 *)
PROG
(Magma) I:=[1, 1, 14, 15, 29, 44, 205, 864, 1069, 1933, 3002, 40959, 43961, 1887321, 1931282, 26993987, 28925269, 55919256, 84844525, 395297356, 1666033949, 2061331305, 3727365254, 5788696559, 78980420521, 84769117080]; [n le 26 select I[n] else 1928280*Self(n-13)+Self(n-26): n in [1..40]]; // Vincenzo Librandi, Dec 27 2013
CROSSREFS
Cf. A041918.
Sequence in context: A075659 A022104 A041398 * A041400 A041396 A041394
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Dec 27 2013
STATUS
approved