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 A099286 Decimal expansion of the error function at 1. 3
 8, 4, 2, 7, 0, 0, 7, 9, 2, 9, 4, 9, 7, 1, 4, 8, 6, 9, 3, 4, 1, 2, 2, 0, 6, 3, 5, 0, 8, 2, 6, 0, 9, 2, 5, 9, 2, 9, 6, 0, 6, 6, 9, 9, 7, 9, 6, 6, 3, 0, 2, 9, 0, 8, 4, 5, 9, 9, 3, 7, 8, 9, 7, 8, 3, 4, 7, 1, 7, 2, 5, 4, 0, 9, 6, 0, 1, 0, 8, 4, 1, 2, 6, 1, 9, 8, 3, 3, 2, 5, 3, 4, 8, 1, 4, 4, 8, 8, 8, 4, 5, 4, 1, 5, 8 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Eric Weisstein's World of Mathematics, Erf FORMULA Equals 1-A099287. Equals (1/e) Sum_{n >= 0} (1/(n/2)!) - 1. - Jean-François Alcover, Jun 14 2020 From Amiram Eldar, Jul 22 2020: (Start) Equals (2/sqrt(Pi)) * Integral_{x=0..1} exp(-x^2) dx. Equals (2/sqrt(Pi)) * Sum_{k>=0} (-1)^k/(k! * (2*k + 1)) = (2/sqrt(Pi)) * Sum_{k>=0} (-1)^k/A007680(k). Equals (1/e) * Sum_{k>=1} 1/Gamma(k + 1/2). (End) EXAMPLE 0.84270079294971486934122063508260925929606699796630290845993789783... MATHEMATICA RealDigits[ Erf[1], 10, 105][[1]] PROG (PARI) 1 - erfc(1) CROSSREFS Cf. A007680, A099287. Sequence in context: A010523 A231534 A014391 * A089729 A173670 A337170 Adjacent sequences:  A099283 A099284 A099285 * A099287 A099288 A099289 KEYWORD cons,nonn AUTHOR Robert G. Wilson v, Oct 08 2004 STATUS approved

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Last modified May 11 09:11 EDT 2021. Contains 343788 sequences. (Running on oeis4.)