The Parker square is the following 
array of positive square
numbers, presented by Matt Parker (Numberphile 2016),
 |
All three row sums, all three column sums, and the top-left to bottom-right diagonal sum equal 3051. The other diagonal sums to 4107. The values 
, 
,
and 
each occur twice. Thus the array
fails both the equal-diagonal-sum and distinct-entry requirements for a magic
square of squares.
