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 A088454 Decimal expansion of 6/(Catalan*Pi^2). 6
 6, 6, 3, 7, 0, 0, 8, 0, 4, 6, 1, 3, 8, 5, 3, 4, 6, 0, 7, 2, 1, 4, 3, 1, 6, 5, 7, 6, 1, 7, 0, 4, 8, 6, 9, 1, 3, 5, 8, 3, 9, 5, 7, 9, 6, 7, 7, 4, 8, 0, 8, 3, 8, 7, 2, 0, 6, 2, 0, 0, 9, 9, 0, 2, 8, 6, 6, 1, 3, 0, 2, 3, 1, 0, 1, 9, 6, 6, 4, 7, 7, 5, 0, 3, 3, 2, 2, 0, 4, 1, 0, 4, 6, 0, 3, 6, 6, 3, 9, 5, 0, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS This is the probability that a randomly chosen Gaussian integer (e.g., -2 + 5i) is squarefree (Pegg, 2003). - Alonso del Arte, Dec 20 2013 LINKS G. C. Greubel, Table of n, a(n) for n = 0..10000 Ed Pegg Jr., The Moebius Function Eric Weisstein's World of Mathematics, Relatively Prime Eric Weisstein's World of Mathematics, Squarefree Eric Weisstein's World of Mathematics, Gaussian Integer EXAMPLE 0.663700804613853460721431657617048691358... MATHEMATICA RealDigits[(6/Pi^2)/Catalan, 10, 100][[1]] (* Alonso del Arte, Dec 20 2013 *) PROG (PARI) 6/(Catalan*Pi^2) \\ G. C. Greubel, Aug 23 2018 (MAGMA) R:= RealField(100); 6/(Catalan(R)*Pi(R)^2); // G. C. Greubel, Aug 23 2018 CROSSREFS Cf. A059956, A006752. Sequence in context: A110632 A202068 A301974 * A095228 A021605 A180573 Adjacent sequences:  A088451 A088452 A088453 * A088455 A088456 A088457 KEYWORD nonn,cons,easy AUTHOR Eric W. Weisstein, Sep 30 2003 STATUS approved

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Last modified August 20 14:36 EDT 2019. Contains 326152 sequences. (Running on oeis4.)