OFFSET
1,1
FORMULA
Equals Sum_{k>=0} 3^k / k!^2.
EXAMPLE
7.158996536804385093824412306333790648...
MATHEMATICA
RealDigits[BesselI[0, 2 Sqrt[3]], 10, 100][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Ilya Gutkovskiy, Nov 28 2023
STATUS
approved