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 A005485 Denominators of convergents to cube root of 7. (Formerly M4781) 2
 1, 1, 11, 23, 379, 781, 1160, 5421, 12002, 17423, 377885, 395308, 1563809, 8214353, 9778162, 27770677, 37548839, 65319516, 168187871, 1915386097, 9745118356, 11660504453, 44726631715, 56387136168, 157500904051, 4308911545545, 17393147086231, 21702058631776 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 REFERENCES D. H. Lehmer, Guide to Tables in the Theory of Numbers. Bulletin No. 105, National Research Council, Washington, DC, 1941, p. 67. P. Seeling, Verwandlung der irrationalen Groesse ... in einen Kettenbruch, Archiv. Math. Phys., 46 (1866), 80-120. N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Denominator[Convergents[7^(1/3), 40]] (* Vincenzo Librandi, Sep 08 2013 *) PROG (PARI) a(n)= contfracpnqn(contfrac(7^(1/3), n))[2, 1];  \\ Michel Marcus, Sep 07 2013 CROSSREFS Cf. A005482, A005484. Sequence in context: A059327 A042005 A153318 * A041240 A193855 A295645 Adjacent sequences:  A005482 A005483 A005484 * A005486 A005487 A005488 KEYWORD nonn,frac AUTHOR EXTENSIONS More terms from Herman P. Robinson. More terms from Michel Marcus, Sep 07 2013 Inserted a(27) by Vincenzo Librandi, Sep 08 2013 STATUS approved

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Last modified June 15 13:47 EDT 2021. Contains 345048 sequences. (Running on oeis4.)