The cache is not at the posted coordinates.
Imagine a circular queue that contains a 15-letter string of n words. Starting at position n, the letter at every nth position is moved to the list shown below. As the letter is moved, the position it occupied is removed from the queue. This process is repeated until all 15 letters have been moved to the list below. Restore the letters to their original order and apply the correction vector to derive the 15-digit coordinate set. Those who are having difficulty wrapping your head around this process could just reorder the 15 letters into an n word phrase.
N I M A E O P C E N D A M R O
2 1 1 ! 0 0 @ * ! # 0 5 % 1 !
Congratulations to first finders nozy nabor and kittyshrink.
