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 A069286 Decimal expansion of constant rho satisfying Gaussian Phi(rho * sqrt(2)) = erf(rho) = 1/2. 2
 4, 7, 6, 9, 3, 6, 2, 7, 6, 2, 0, 4, 4, 6, 9, 8, 7, 3, 3, 8, 1, 4, 1, 8, 3, 5, 3, 6, 4, 3, 1, 3, 0, 5, 5, 9, 8, 0, 8, 9, 6, 9, 7, 4, 9, 0, 5, 9, 4, 7, 0, 6, 4, 4, 7, 0, 3, 8, 8, 2, 6, 9, 5, 9, 1, 9, 3, 8, 3, 4, 4, 7, 7, 7, 4, 6, 4, 6, 7, 3, 3, 4, 8, 8, 6, 9, 5, 9, 1, 5, 8, 6, 9, 9, 8, 9, 0, 0, 9, 9, 4, 8, 0, 3, 3 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS In Bronstein-Semendjajew, Gaussian Phi is the probability integral, i.e., 2 * Normal Distribution Function. REFERENCES Bronstein-Semendjajew, Taschenbuch der Mathematik, 7th German ed. 1965, ch. 6.1.2. LINKS Eric Weisstein's World of Mathematics, Probable Error t= rho * sqrt(2)= 06745... Eric Weisstein's World of Mathematics, Normal Distribution Function (World of Mathematics). Eric Weisstein's World of Mathematics, Inverse Erf EXAMPLE 0.4769362762044698733814183536431305598089697490594706447... MATHEMATICA RealDigits[ InverseErf[1/2], 10, 105][[1]] (* Robert G. Wilson v, Oct 11 2004 *) PROG (PARI) solve(x=0, 1, erfc(x)-1/2) \\ Charles R Greathouse IV, Oct 15 2015 CROSSREFS Cf. A069287 (continued fraction), A007680. Sequence in context: A081845 A254339 A140877 * A079354 A255248 A122460 Adjacent sequences:  A069283 A069284 A069285 * A069287 A069288 A069289 KEYWORD nonn,cons AUTHOR Frank Ellermann, Mar 13 2002 STATUS approved

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