OFFSET
0,1
REFERENCES
S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 424-425.
EXAMPLE
0.646761122...
MATHEMATICA
(ExpIntegralEi[1] - E^2*ExpIntegralEi[-1])/(2*E) // RealDigits[#, 10, 100]& // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Mar 11 2013
STATUS
approved