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 A195628 Decimal expansion of arctan(4). 4
 1, 3, 2, 5, 8, 1, 7, 6, 6, 3, 6, 6, 8, 0, 3, 2, 4, 6, 5, 0, 5, 9, 2, 3, 9, 2, 1, 0, 4, 2, 8, 4, 7, 5, 6, 3, 1, 1, 8, 4, 4, 4, 0, 6, 0, 1, 3, 0, 6, 3, 6, 8, 8, 4, 3, 3, 6, 0, 0, 9, 6, 3, 8, 1, 4, 8, 6, 5, 5, 3, 0, 8, 3, 5, 5, 5, 4, 6, 2, 4, 0, 2, 7, 3, 9, 4, 8, 3, 2, 5, 5, 0, 0, 2, 3, 5, 6, 5, 4, 2 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS G. C. Greubel, Table of n, a(n) for n = 1..10000 FORMULA Equals arcsin(4/sqrt(17)) = arccos(1/sqrt(17)). - Amiram Eldar, Jul 11 2023 EXAMPLE arctan(4) = 1.3258176636680324650592392104284756311844406013... MATHEMATICA r = 4; N[ArcTan[r], 100] RealDigits[%] (* A195628 *) N[ArcCot[r], 100] RealDigits[%] (* A195727 *) N[ArcSec[r], 100] RealDigits[%] (* A195731 *) N[ArcCsc[r], 100] RealDigits[%] (* A195621 *) PROG (Magma) SetDefaultRealField(RealField(125)); Arctan(4); // G. C. Greubel, Apr 13 2023 (SageMath) numerical_approx( arctan(4), digits=125) # G. C. Greubel, Apr 13 2023 CROSSREFS Cf. A195727, A195731, A195621. Sequence in context: A094894 A089334 A016649 * A124422 A223544 A132776 Adjacent sequences: A195625 A195626 A195627 * A195629 A195630 A195631 KEYWORD nonn,cons AUTHOR Clark Kimberling, Sep 23 2011 STATUS approved

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Last modified September 25 11:40 EDT 2023. Contains 365644 sequences. (Running on oeis4.)