I was going to do this, but you beat me to it! 
(For anyone wondering, the formula is
850 * e^(0.032r)
e=2.718281828459045…
r=rank, 30k=0, 10k=20, 1k=29, 1d=30, 9d=38)
(Also I made a table for this over at Glicko Rating Changes)
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