OFFSET
1,1
FORMULA
Equals Sum_{k>=0} e^(2*k)/(2*k)!.
EXAMPLE
(e^e + e^(-e))/2 = 7.6101251386622883634186102301133791...
MATHEMATICA
RealDigits[Cosh[E], 10, 110] [[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Ilya Gutkovskiy, Apr 26 2020
STATUS
approved