OFFSET
0,1
LINKS
Michael I. Shamos, A catalog of the real numbers (2011).
FORMULA
Equals (cos(1) + 2*cos(1/2)*cosh(sqrt(3)/2))/3. - Amiram Eldar, Jun 04 2023
EXAMPLE
0.9986111131987866537058529349...
MATHEMATICA
RealDigits[(Cos[1] + 2*Cos[1/2]*Cosh[Sqrt[3]/2])/3, 10, 120][[1]] (* Amiram Eldar, Jun 04 2023 *)
PROG
(PARI) sumalt(k=0, (-1)^k/(6*k)!) \\ Michel Marcus, Jul 18 2021
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Sean A. Irvine, Jul 17 2021
STATUS
approved