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A041049
Denominators of continued fraction convergents to sqrt(30).
3
1, 2, 21, 44, 461, 966, 10121, 21208, 222201, 465610, 4878301, 10222212, 107100421, 224423054, 2351330961, 4927084976, 51622180721, 108171446418, 1133336644901, 2374844736220, 24881784007101
OFFSET
0,2
FORMULA
G.f.: (1+2*x-x^2)/(1-22*x^2+x^4). [Colin Barker, Jan 02 2012]
MATHEMATICA
Table[Denominator[FromContinuedFraction[ContinuedFraction[Sqrt[30], n]]], {n, 1, 50}] (* Vladimir Joseph Stephan Orlovsky, Mar 18 2011 *)
Denominator[Convergents[Sqrt[30], 20]] (* Vincenzo Librandi, Oct 23 2013 *)
CROSSREFS
Cf. A010485, A040024, A041048 (numerators).
Sequence in context: A089558 A266873 A215753 * A224346 A005484 A330201
KEYWORD
nonn,cofr,frac,easy
STATUS
approved