login
A133840
Decimal expansion of second inflection point of Planck's radiation function.
4
2, 8, 3, 7, 5, 7, 2, 9, 6, 3, 8, 0, 0, 7, 5, 5, 2, 5, 6, 3, 8, 2, 3, 4, 9, 5, 1, 5, 7, 4, 7, 6, 7, 6, 9, 7, 8, 4, 6, 2, 5, 2, 8, 4, 5, 4, 2, 3, 4, 5, 1, 5, 4, 0, 4, 5, 6, 4, 5, 4, 1, 0, 1, 2, 1, 3, 6, 2, 5, 4, 3, 7, 4, 2, 5, 4, 2, 6, 9, 1, 6, 8, 8, 8, 7, 6, 2, 2, 3, 2, 5, 8, 6, 7, 6, 1, 2, 1, 6, 5, 4, 8, 2, 4, 8
OFFSET
0,1
LINKS
Eric Weisstein's World of Mathematics, Planck's Radiation Function
EXAMPLE
0.28375729638007552563...
MATHEMATICA
f[x_] := 1/(x^5*(E^(1/x)-1)); RealDigits[x /. FindRoot[f''[x], {x, 1/4}, WorkingPrecision -> 110], 10, 105][[1]] (* Amiram Eldar, Sep 08 2020 *)
CROSSREFS
Sequence in context: A309640 A185576 A256921 * A337570 A190732 A081349
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Sep 26 2007
STATUS
approved