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A262276 Decimal expansion of Toth's constant (or digits of the density of the exponentially squarefree numbers). 2
9, 5, 5, 9, 2, 3, 0, 1, 5, 8, 6, 1, 9, 0, 2, 3, 7, 6, 8, 8, 4, 0, 6, 5, 3, 8, 6, 7, 0, 9, 8, 7, 0, 0, 7, 4, 6, 7, 7, 1, 5, 9, 4, 3, 1, 6, 5, 4, 5, 6, 8, 6, 8, 8, 3, 2, 8, 0, 5, 8, 9, 4, 9, 0, 1, 8, 1, 7, 2, 8, 7, 0, 1, 5, 5, 2, 2, 9, 2, 5, 7, 1, 0, 3, 5, 7, 2, 0, 0, 5, 5, 9, 1, 1, 6, 4, 4, 0, 3, 5, 2, 3, 0, 1, 2, 9, 3, 3, 4, 7, 1, 7, 1, 5, 8, 0, 1, 2, 2, 4, 3, 6, 3, 9, 8, 9, 3, 3, 8, 8, 1, 2, 0, 3, 8, 6, 6, 0, 1, 3, 2, 8, 6, 3, 2, 6, 7, 5, 2, 0, 6, 6, 3, 5, 8, 0, 2, 7, 1, 7, 9, 6, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..162.

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

Laszlo Tóth, On certain arithmetic functions involving exponential divisors, II., Annales Univ. Sci. Budapest., Sect. Comp., 27 (2007), 155-166.

FORMULA

Product_{prime p}(1+Sum_{j>=4}((mu(j)^2 - mu(j-1)^2)/p^j), where mu(n) is the Möbius function.

EXAMPLE

0.95592301586190237688406538670987007467715943165456868832805...

CROSSREFS

Density of A209061.

Sequence in context: A155534 A154683 A200026 * A244844 A255896 A019882

Adjacent sequences:  A262273 A262274 A262275 * A262277 A262278 A262279

KEYWORD

nonn,cons

AUTHOR

Juan Arias-de-Reyna, Sep 19 2015

STATUS

approved

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Last modified July 19 10:45 EDT 2019. Contains 325155 sequences. (Running on oeis4.)