Neat! I enter it differently, but still get the same result. It seems either my math is wrong, or Wolfram alpha is wrong. Since Wolfram Alpha agrees with me for Y=100 while disagreeing with me for Y=1, I think my math is probably right, and something funny happens with Wolfram Alpha for the Y=1 case.

I get my result with Matlab, Wolfram Alpha/Mathematica, Maple, Google calculator, and my TI-84+ graphing calculator. The more likely conclusion is that your math is off for the Y=1 case.

This is a critical topic, but LessWrong hates it.

I think you have neglected the presentation of the topic as a confounding variable in that analysis.