OFFSET
1,3
COMMENTS
According to Borwein and Borwein (1982), this approximates (1/100)*(Sum_{k=-oo..+oo} 1/10^((k/100)^2)) to at least 18000 correct digits. See Sum 11, p. 623.
LINKS
Paolo Xausa, Table of n, a(n) for n = 1..10000
J. M. Borwein and P. B. Borwein, Strange Series and High Precision Fraud, The American Mathematical Monthly, Vol. 99, No. 7 (1992), pp. 622-640.
FORMULA
Equals sqrt(A197071).
EXAMPLE
1.168065218145734081547039611835696565835047073019223599580...
MATHEMATICA
First[RealDigits[Sqrt[Pi/Log[10]], 10, 100]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Paolo Xausa, May 07 2024
STATUS
approved