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 A185199 Decimal expansion of 4/Pi^2. 3
 4, 0, 5, 2, 8, 4, 7, 3, 4, 5, 6, 9, 3, 5, 1, 0, 8, 5, 7, 7, 5, 5, 1, 7, 8, 5, 2, 8, 3, 8, 9, 1, 0, 5, 5, 5, 6, 1, 7, 4, 3, 5, 0, 9, 8, 6, 8, 8, 9, 8, 6, 1, 9, 5, 3, 8, 2, 4, 3, 6, 1, 2, 7, 5, 7, 6, 6, 9, 2, 4, 8, 3, 8, 4, 8, 9, 4, 1, 7, 6, 4, 7, 6, 4, 8, 3, 7, 0, 9, 5, 7, 0, 2, 4, 8, 7, 3, 5, 0 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Density of the odd squarefree numbers A056911. - Charles R Greathouse IV, Jun 08 2016 REFERENCES C. F. Gauss, Disquisitiones Arithmeticae, Yale, 1965; see p. 359. LINKS G. C. Greubel, Table of n, a(n) for n = 0..5000 EXAMPLE .40528473456935108577551785283891055561743509868898619538243... MATHEMATICA RealDigits[4/Pi^2, 10, 50][[1]] (* G. C. Greubel, Jun 24 2017 *) PROG (PARI) 4/Pi^2 \\ Charles R Greathouse IV, Jun 08 2016 CROSSREFS Sequence in context: A083745 A327545 A306072 * A201196 A019906 A197251 Adjacent sequences:  A185196 A185197 A185198 * A185200 A185201 A185202 KEYWORD cons,nonn AUTHOR N. J. A. Sloane, Feb 19 2011 STATUS approved

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Last modified August 7 19:32 EDT 2020. Contains 336279 sequences. (Running on oeis4.)