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 A195704 Decimal expansion of arccos(-sqrt(1/8)). 2
 1, 9, 3, 2, 1, 6, 3, 4, 5, 0, 7, 0, 1, 6, 0, 4, 4, 2, 4, 8, 2, 0, 5, 1, 0, 3, 6, 7, 9, 6, 0, 4, 1, 8, 1, 2, 3, 1, 1, 1, 1, 9, 3, 9, 4, 2, 8, 9, 9, 7, 7, 3, 0, 4, 4, 3, 0, 0, 8, 4, 9, 3, 6, 2, 4, 4, 5, 7, 6, 1, 8, 9, 4, 1, 0, 0, 4, 1, 9, 6, 3, 1, 7, 9, 6, 4, 3, 1, 2, 1, 8, 1, 4, 0, 6, 0, 9, 1, 8, 5 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS G. C. Greubel, Table of n, a(n) for n = 1..5000 EXAMPLE arccos(-sqrt(1/8)) = 1.93216345070... MATHEMATICA r = Sqrt[1/8]; N[ArcSin[r], 100] RealDigits[%]  (* A195699 *) N[ArcCos[r], 100] RealDigits[%]  (* A168229 *) N[ArcTan[r], 100] RealDigits[%]  (* A188615 *) N[ArcCos[-r], 100] RealDigits[%]  (* A195704 *) PROG (PARI) acos(-sqrt(1/8)) \\ G. C. Greubel, Nov 18 2017 (MAGMA) [Arccos(-Sqrt(1/8))]; // G. C. Greubel, Nov 18 2017 CROSSREFS Cf. A195699. Sequence in context: A086232 A133867 A210113 * A176516 A337768 A210644 Adjacent sequences:  A195701 A195702 A195703 * A195705 A195706 A195707 KEYWORD nonn,cons AUTHOR Clark Kimberling, Sep 23 2011 STATUS approved

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Last modified June 13 18:45 EDT 2021. Contains 345008 sequences. (Running on oeis4.)