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 A002361 Denominators of convergents to fifth root of 2. (Formerly M4062 N1684) 2
 1, 6, 7, 20, 27, 47, 74, 269, 6799, 7068, 35071, 112281, 371914, 2715679, 141587222, 144302901, 430193024, 1434881973, 3299956970, 50934236523, 105168430016, 261271096555, 1150252816236, 18665316156331, 38480885128898, 288031512058617, 326512397187515 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 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, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). 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[2^(1/5), 30]] (* Harvey P. Dale, Apr 27 2012 *) PROG (PARI) a(n)= contfracpnqn(contfrac(2^(1/5), n))[2, 1]; \\ Michel Marcus, Sep 07 2013 CROSSREFS Cf. A002362, A005531. Sequence in context: A175262 A345911 A081348 * A041185 A042389 A287859 Adjacent sequences: A002358 A002359 A002360 * A002362 A002363 A002364 KEYWORD nonn,frac AUTHOR N. J. A. Sloane EXTENSIONS More terms from Herman P. Robinson Definition clarified and more terms from Harvey P. Dale, Apr 27 2012 STATUS approved

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Last modified December 1 15:30 EST 2023. Contains 367476 sequences. (Running on oeis4.)