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A160327 Decimal expansion of (e-1)/(e+1). 2
4, 6, 2, 1, 1, 7, 1, 5, 7, 2, 6, 0, 0, 0, 9, 7, 5, 8, 5, 0, 2, 3, 1, 8, 4, 8, 3, 6, 4, 3, 6, 7, 2, 5, 4, 8, 7, 3, 0, 2, 8, 9, 2, 8, 0, 3, 3, 0, 1, 1, 3, 0, 3, 8, 5, 5, 2, 7, 3, 1, 8, 1, 5, 8, 3, 8, 0, 8, 0, 9, 0, 6, 1, 4, 0, 4, 0, 9, 2, 7, 8, 7, 7, 4, 9, 4, 9, 0, 6, 4, 1, 5, 1, 9, 6, 2, 4, 9, 0, 5, 8, 4, 3, 4, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..20000

FORMULA

(e-1)/(e+1) = tanh(1/2).

EXAMPLE

0.462117157260009758502318483643672548730289280330113038552731815838080...

MATHEMATICA

RealDigits[(E-1)/(E+1), 10, 100][[1]] (* G. C. Greubel, Oct 05 2018 *)

PROG

(PARI) { default(realprecision, 20080); x=tanh(1/2)*10; for (n=0, 20000, d=floor(x); x=(x-d)*10; write("b160327.txt", n, " ", d)); }

(PARI) (exp(1)-1)/(exp(1)+1) \\ Altug Alkan, Oct 05 2018

(MAGMA) SetDefaultRealField(RealField(100)); (Exp(1) - 1)/(Exp(1) + 1); // G. C. Greubel, Oct 05 2018

CROSSREFS

Cf. A016825 (continued fraction), A086403/A079165 (convergents).

Sequence in context: A258220 A158391 A016491 * A124259 A214549 A154892

Adjacent sequences:  A160324 A160325 A160326 * A160328 A160329 A160330

KEYWORD

nonn,easy,cons

AUTHOR

Harry J. Smith, May 09 2009

STATUS

approved

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Last modified February 20 12:57 EST 2019. Contains 320327 sequences. (Running on oeis4.)