OFFSET
0,1
FORMULA
Equals Pi/2 - A275477.
EXAMPLE
0.69010709137453995200...
MATHEMATICA
First@RealDigits@N[ArcSin[2/Pi], 120]
PROG
(PARI) default(realprecision, 100); asin(2/Pi)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jianing Song, Jan 18 2020
STATUS
approved