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 A006524 Egyptian fraction for 1/ Pi. (Formerly M3509) 26
 4, 15, 609, 845029, 1010073215739, 1300459886313272270974271, 1939680952094609786557359582286462958434022504402 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES 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..11 [a(11) corrected by Georg Fischer, Jun 04 2019] H. P. Robinson, Letter to N. J. A. Sloane, Sep 1975 Eric Weisstein's World of Mathematics, Egyptian Fraction MATHEMATICA a = {}; k = N[1/Pi, 1000]; Do[s = Ceiling[1/k]; AppendTo[a, s]; k = k - 1/s, {n, 1, 10}]; a (* Artur Jasinski, Sep 22 2008 *) PROG (PARI) x = 1/Pi; f(x, k) = if(k<1, x, f(x, k - 1) - 1/n(x, k)); n(x, k) = ceil(1/f(x, k - 1)); for(k = 1, 7, print1(n(x, k), ", ") \\ Indranil Ghosh, Mar 27 2017 CROSSREFS Sequence in context: A048731 A000881 A109923 * A299683 A341598 A295231 Adjacent sequences:  A006521 A006522 A006523 * A006525 A006526 A006527 KEYWORD nonn,frac AUTHOR EXTENSIONS More terms from Herman P. Robinson Offset changed to 1 by Indranil Ghosh, Mar 27 2017 STATUS approved

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Last modified May 17 12:55 EDT 2021. Contains 343971 sequences. (Running on oeis4.)