math Common summations in computer science Sums of reciprocal squares: 1/1 + 1/4 + 1/9 + 1/16 + 1/25 + ...
Example
The summation
1/1 + 1/4 + 1/9 + 1/16 + ...
out to infinity converges to π2 / 6, and therefore any summation of the form
1/1 + 1/4 + 1/9 + 1/16 + ... + 1/n2
is Θ(1).
