OFFSET
1,2
COMMENTS
Same as decimal expansion of Pi/P, where P is the Universal parabolic constant (A103710). - Jonathan Sondow, Jan 19 2015
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
M. Hajja, Review Zbl 1291.51018, zbMATH 2015.
M. Hajja, Review Zbl 1291.51016, zbMATH 2015.
J. Sondow, The parbelos, a parabolic analog of the arbelos, arXiv 2012, Amer. Math. Monthly, 120 (2013), 929-935.
E. Tsukerman, Solution of Sondow's problem: a synthetic proof of the tangency property of the parbelos, arXiv 2012, Amer. Math. Monthly, 121 (2014), 438-443.
EXAMPLE
1.36853556373191478886062626593258810842142480010621734905399...
MATHEMATICA
RealDigits[Pi/(Sqrt[2] + Log[1 + Sqrt[2]]), 10, 100]
PROG
(PARI) Pi/(sqrt(2) + log(1 + sqrt(2))) \\ G. C. Greubel, Jul 27 2018
(Magma) R:= RealField(); Pi(R)/(Sqrt(2) + Log(1 + Sqrt(2))) // G. C. Greubel, Jul 27 2018
CROSSREFS
KEYWORD
AUTHOR
Jonathan Sondow, Nov 28 2013
STATUS
approved