Baseball and Apple Pi Mystery Cache

Since there is not currently a puzzle cache in Greensburg, I decided to add one. This one is "as American as baseball and apple pi."

The coordinates listed are not what you are looking for. If you go to this spot, you will likely get run over. The puzzle will need to be solved to get the actual coordinates.

Congrats to twilli1621 for being the FTF!

To solve this puzzle, you will need to know the numbers used in Pi. I used the wikipedia page for Pi as my reference. The letter of the coordinate equals the number in order of the long sequence of Pi. For example, if a=21, you want the number that is the 21st number of Pi. Once you have the coordinates, make your way to the cache. 

N ab cd.efg    W hij kl.mno

a=16  b=31  c=41  d=13  e=27  f=33  g=5  h=51  i=19  j=9  k=1  l=4  m=47  n=38  o=55

This cache is hidden in a spot where at times there will be no one in sight, or on certain occasions there are muggles everywhere. If you do see numerous people, please come back another time. There is just no way to be stealthy in it's current location. The cache contains just a log, so please bring your own writing tool.