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A249103
Decimal expansion of (Pi^2/15)^(1/3).
2
8, 6, 9, 7, 6, 6, 8, 0, 5, 3, 1, 1, 4, 8, 5, 8, 2, 6, 2, 8, 0, 2, 1, 0, 9, 8, 2, 9, 7, 2, 9, 2, 1, 0, 9, 8, 2, 9, 0, 2, 4, 0, 1, 6, 9, 3, 5, 5, 4, 5, 3, 9, 8, 0, 7, 5, 8, 1, 7, 1, 7, 4, 0, 8, 6, 5, 0, 1, 2, 1, 1, 1, 2, 3, 3, 4, 3, 8, 2, 0, 5, 0, 8, 5, 5, 8, 1, 3, 6, 9, 4, 2, 4, 0
OFFSET
0,1
COMMENTS
In physics, ratio of the dimensionless blackbody radiation constant alpha_R to the dimensionless fine structure constant alpha.
LINKS
Ke Xiao, Dimensionless Constants and Blackbody Radiation Laws, Electronic Journal of Theoretical Physics, 8(2011), 379-388, Eq.4.
FORMULA
Equals A182448^(1/3).
EXAMPLE
0.869766805311485826280210982972921098290240169355453980758171740...
MATHEMATICA
RealDigits[(Pi^2/15)^(1/3), 10, 120][[1]] (* Vaclav Kotesovec, Oct 22 2014 *)
PROG
(PARI) (Pi^2/15)^(1/3)
CROSSREFS
KEYWORD
nonn,cons,easy
AUTHOR
Stanislav Sykora, Oct 21 2014
STATUS
approved