OFFSET
0,1
COMMENTS
Apart from initial digits the same as A245250.
REFERENCES
Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Sections 1.7 Catalan's constant p.54, and 5.6 Otter's Tree Enumeration Constants, p. 311.
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..10000
Yinsong Chen and Vladislav Kargin, On enumeration and entropy of ribbon tilings, The Electronic Journal of Combinatorics 30(2) (2023), #P2.15. See p. 3.
EXAMPLE
0.84126694072473047188934886025473436202631762456...
MATHEMATICA
RealDigits[2 Catalan/(Pi*Log[2]), 10, 103] // First
PROG
(PARI) default(realprecision, 100); 2*Catalan/(Pi*log(2)) \\ G. C. Greubel, Aug 25 2018
(Magma) SetDefaultRealField(RealField(100)); R:=RealField(); 2*Catalan(R)/(Pi(R)*Log(2)); // G. C. Greubel, Aug 25 2018
CROSSREFS
KEYWORD
AUTHOR
Jean-François Alcover, Sep 10 2014
STATUS
approved