3  PI  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  23  24  25  27  30  31  33  35  37  40  42  45  48  49  50  58  59  60  63  69  70  75  79  99  100  101  121  124  136  200  225  500  5,978 

Why we have leap days

"Warning: this post has math in it. A lot. Some of it might even be correct. If you are mathophobic, then you might want to skip to the end, where I reveal what Rosebud means.

And for those of you who are incredibly anal, yes, I know I kinda lost track of significant digits about 2/3 of the way through this. I was using a calculator, and just used whatever numbers it gave me to the last decimal place, leaving off for the most part trailing 0s. Sue me. I’m free on February 29th, 4800."

[via Bad Astronomy]