OFFSET
0,2
REFERENCES
S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 424-425.
FORMULA
(e^2*Ei(-1)+Ei(1))/(2*e) where Ei is the exponential integral function. - Jean-François Alcover, Feb 19 2014
EXAMPLE
.050413760455935997212200091275136109621498785400910367873
MATHEMATICA
Join[{0}, (E^2*ExpIntegralEi[-1] + ExpIntegralEi[1])/(2*E) // RealDigits[#, 10, 106]& // First] (* Jean-François Alcover, Feb 19 2014 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
N. J. A. Sloane, Sep 28 2013
STATUS
approved