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A271727 Decimal expansion of the density of exponentially 2^n-numbers (A138302). 3
8, 7, 2, 4, 9, 7, 1, 7, 9, 3, 5, 3, 9, 1, 2, 8, 1, 3, 5, 5, 8, 0, 0, 7, 7, 1, 4, 3, 3, 2, 5, 3, 1, 8, 6, 6, 9, 1, 9, 5, 8, 3, 9, 3, 9, 7, 7, 7, 3, 3, 3, 7, 3, 7, 6, 5, 4, 1, 2, 4, 2, 2, 6, 2, 1, 3, 1, 1, 2, 7, 8, 3, 5, 9, 0, 3, 9, 8, 1, 4, 2, 9, 7, 9, 2, 2, 1, 7, 8, 4, 4, 1, 6, 5, 9, 9, 1, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Juan Arias-de-Reyna, Table of n, a(n) for n = 0..1000

Vladimir Shevelev, Exponentially S-numbers, arXiv:1510.05914 [math.NT], 2015.

Vladimir Shevelev, A fast computation of density of exponentially S-numbers, arXiv:1602.04244 [math.NT], 2016.

FORMULA

Product_{prime p} f(1/p), where f(x)=1-x^3+Sum_{n>=2}(x^(2^n)-x^{1+2^n}).

EXAMPLE

0.87249717935391281355800771433253186691958393977733373765412...

CROSSREFS

Density of A138302. Cf. A271726 (Expansion of log(f(x)).

Sequence in context: A328895 A154846 A173598 * A154164 A021538 A179044

Adjacent sequences:  A271724 A271725 A271726 * A271728 A271729 A271730

KEYWORD

nonn,cons

AUTHOR

Juan Arias-de-Reyna, Apr 13 2016

STATUS

approved

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Last modified May 27 21:52 EDT 2020. Contains 334671 sequences. (Running on oeis4.)