This turns out to be the missing cache on Blue Switch Day. But since the cache was already hidden, there's no reason not to activate it.
Container is hidden at: N46 35.XYZ W114 07.YYZ
Where:
A is the number after 1 and B is the number after A
So, X equals A squared
Y equals X plus A
Z equals B squared
Since I can't figure out how to change the Checker - enter this number in the checker. THEN
OKAY, now take that answer and add .003 to the North coordinates and subtract .005 from the west coordinates.
Sum total of corrected coordinates [last 3 of both north and west] should be 29 [for the adjusted coordinates].