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 A053003 Continued fraction for M(1,sqrt(2)). 4
 1, 5, 21, 3, 4, 14, 1, 1, 1, 1, 1, 3, 1, 15, 1, 3, 8, 36, 1, 2, 5, 2, 1, 1, 2, 2, 6, 9, 1, 1, 1, 3, 1, 2, 6, 1, 5, 1, 1, 2, 1, 13, 2, 2, 5, 1, 2, 2, 1, 5, 1, 3, 1, 3, 1, 2, 2, 2, 2, 8, 3, 1, 2, 2, 1, 10, 2, 2, 2, 3, 3, 1, 7, 1, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 5, 2, 1, 2, 17, 1, 4, 31, 2, 2, 5, 30, 1, 8, 2, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS M(a,b) is the limit of the arithmetic-geometric mean iteration applied repeatedly starting with a and b: a_0=a, b_0=b, a_{n+1}=(a_n+b_n)/2, b_{n+1}=sqrt(a_n*b_n). REFERENCES J. M. Borwein and P. B. Borwein, Pi and the AGM, page 5. J. R. Goldman, The Queen of Mathematics, 1998, p. 92. LINKS Harry J. Smith, Table of n, a(n) for n = 1..20000 Eric Weisstein's World of Mathematics, Gauss Constant. G. Xiao, Contfrac EXAMPLE 1.19814023473559220743992249228... MATHEMATICA ContinuedFraction[ArithmeticGeometricMean[1, Sqrt[2]], 100] (* Harvey P. Dale, Feb 26 2012 *) PROG (PARI) { allocatemem(932245000); default(realprecision, 21000); x=contfrac(agm(1, sqrt(2))); for (n=1, 20000, write("b053003.txt", n, " ", x[n])); } \\ Harry J. Smith, Apr 20 2009 CROSSREFS Cf. A014549, A053002, A053004. Sequence in context: A224867 A156824 A053002 * A346035 A167202 A204914 Adjacent sequences:  A053000 A053001 A053002 * A053004 A053005 A053006 KEYWORD nonn,cofr,nice,easy AUTHOR N. J. A. Sloane, Feb 21 2000 EXTENSIONS More terms from James A. Sellers, Feb 22 2000 STATUS approved

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Last modified December 1 22:12 EST 2021. Contains 349435 sequences. (Running on oeis4.)