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A246668
Decimal expansion of the asymptotic probability of success in the full information version of the secretary problem.
2
4, 4, 9, 2, 4, 7, 2, 1, 8, 8, 6, 9, 2, 1, 6, 2, 7, 1, 2, 2, 9, 8, 7, 9, 3, 9, 4, 3, 7, 9, 7, 0, 9, 2, 6, 7, 5, 0, 4, 8, 5, 8, 7, 3, 6, 3, 6, 9, 4, 5, 9, 4, 6, 4, 8, 6, 8, 4, 1, 3, 7, 4, 7, 6, 4, 4, 9, 3, 5, 5, 5, 8, 6, 7, 2, 6, 3, 2, 6, 4, 2, 4, 5, 5, 4, 8, 0, 4, 3, 7, 2, 7, 6, 8, 7, 6, 8, 4, 1, 5, 1
OFFSET
0,1
REFERENCES
Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.15 Optimal stopping constants, p. 361.
FORMULA
e^(-b) - (e^b - b - 1)*Ei(-b), where b is A246667 and Ei is the exponential integral function.
EXAMPLE
0.4492472188692162712298793943797092675048587363694594648684...
MATHEMATICA
b = x /. FindRoot[ExpIntegralEi[-x] - EulerGamma - Log[x] == -1, {x, 2}, WorkingPrecision -> 102]; E^-b - (E^b - b - 1)*ExpIntegralEi[-b] // RealDigits // First
CROSSREFS
Cf. A246667.
Sequence in context: A165441 A204997 A178840 * A021073 A021961 A115365
KEYWORD
nonn,cons,easy
AUTHOR
STATUS
approved