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A143347 Decimal expansion of the paper-folding constant. 0
8, 5, 0, 7, 3, 6, 1, 8, 8, 2, 0, 1, 8, 6, 7, 2, 6, 0, 3, 6, 7, 7, 9, 7, 7, 6, 0, 5, 3, 2, 0, 6, 6, 6, 0, 4, 4, 1, 1, 3, 9, 9, 4, 9, 3, 0, 8, 2, 7, 1, 0, 6, 4, 7, 7, 2, 8, 1, 6, 8, 2, 6, 1, 0, 3, 1, 8, 3, 0, 1, 5, 8, 4, 5, 9, 3, 1, 9, 4, 4, 5, 3, 4, 8, 5, 4, 5, 9, 8, 2, 6, 4, 2, 1, 9, 3, 9, 2, 3, 9, 9, 6, 0, 9, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..104.

Joerg Arndt, Matters Computational (The Fxtbook), p.744

Eric Weisstein's World of Mathematics, Paper Folding Constant

EXAMPLE

0.85073618820186726036...

MATHEMATICA

RealDigits[ N[ Sum[ 8^2^k/(2^2^(k + 2) - 1), {k, 0, Infinity}], 110]][[1]][[1 ;; 105]] (* Jean-Fran├žois Alcover, Oct 26 2012 *)

PROG

(PARI) default(realprecision, 510);

c=sum(k=0, 10, 1.0/( 2^(2^k) * ( 1 - 1/(2^(2^(k+2))) ) ) )

/* Joerg Arndt, Aug 28 2011 */

CROSSREFS

Sequence in context: A146489 A230162 A197841 * A073448 A073745 A086730

Adjacent sequences:  A143344 A143345 A143346 * A143348 A143349 A143350

KEYWORD

nonn,cons,changed

AUTHOR

Eric W. Weisstein, Aug 09 2008

STATUS

approved

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Last modified August 27 19:53 EDT 2015. Contains 261098 sequences.