OFFSET
1,2
FORMULA
Equals (cos(1) + 3*sin(1))/2.
Equals 2* 1F2(3;3/2,2;-1/4). - R. J. Mathar, Aug 02 2024
EXAMPLE
1.532357630145914618679221786166936801299999801506...
MATHEMATICA
s = Sum[(-1)^k (k + 2)/(2 k + 1)!, {k, 0, Infinity}]
d = N[s, 100]
First[RealDigits[d]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, May 12 2024
STATUS
approved