OFFSET
1,2
COMMENTS
Division through 3 gives 0.472799.. = integral_{x=0..infinity} x^2*I_1(x)*K_1(x)^2 dx, where I and K are Modified Bessel Functions.
FORMULA
Equals 4*Pi/3^(3/2) - 1. - Vaclav Kotesovec, Apr 10 2016
EXAMPLE
1.41839915231229046745877101018954097637875499745698743409317991385...
MATHEMATICA
RealDigits[4*Pi/3^(3/2) - 1, 10, 120][[1]] (* Vaclav Kotesovec, Apr 10 2016 *)
PROG
(PARI) 4*Pi/sqrt(27)-1 \\ Charles R Greathouse IV, Aug 01 2016
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Oct 19 2015
STATUS
approved