Squares Ending in 5 Occurrences of 2-Digit Pattern/Mistake

Source Work

 * The Dictionary
 * $21$
 * $21$

Mistake

 * If a square ends in the pattern $xyxyxyxyxy$, then $xy$ is either $21$, $61$ or $84$.

Correction
Also there are $29$ and $69$.

In, this has been corrected.