Plenty of this sort in Relativity 4 Engineers, but here is a more colorful one.
This one is plotted for H0 = 71.9 km/s/Mpc, 26% matter and 74% vacuum energy components.
The present age is 13.66 Gy, with R = 100 Gly, which is an arbitrary scale for convenience. It is for a flat universe, where the actual radius should be infinite.
As you can see, it is not a very remarkable curve at all! Right at t=0.2 Gy, the slope is quite large (some 8:1), but only for a very short time.
-J
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"Curiosity has its own reason for existence" -- Albert Einstein
