Re: [math-fun] Chernick numbers

Michael Kleber:

If you just want it to add up the damn numbers, you can always

In[2]:= Plus @@ N[Table[1/(Prime[k]^2-1), {k,1,10000000}],20] Out[2]= 0.55169329737778261329

The caveat being that only 9 digits are good. Going to 10^8 gives you 10 digits. Fortunately we have http://oeis.org/A154945 to compare.