OFFSET
0,1
COMMENTS
This constant is transcendental.
FORMULA
Equals sinh(1/2).
Equals (1/2) * Product_{k>=1} 1 + 1/(2*k*Pi)^2. - Amiram Eldar, Jul 16 2020
EXAMPLE
1/(2^1*1!) + 1/(2^3*3!) + 1/(2^5*5!) + ... = 0.52109530549374736162242...
MATHEMATICA
RealDigits[Sinh[1/2], 10, 110] [[1]]
PROG
(PARI) sinh(1/2) \\ Michel Marcus, Apr 25 2020
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Ilya Gutkovskiy, Apr 24 2020
STATUS
approved