> Note that summing the sequence 1, 3, ... (1 + 2n) gives the value n^2.
> Thus the curve is parabolic. Or at least the step up at the end of each
> decade sits on a parabola. The intermediate steps track along flat or
> step up at 45 degrees. to get to that point.
Correction:
That last term should be (2n - 1) rather than (1 + 2n).
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