Magic sum, 2056, for numerous patterns of 16
numbers:
All horizontal rows and
vertical columns
2 main and 60 broken
diagonals.
169 squares, 4x4. Three
examples highlighted.
2 initials of author
1.4 trillion combinations of
eight horizontal pairs summing to 257.
246 thousand combinations of
four vertical quartets.
Note: Each vertical column has four
quartets, two of which sum to 512 and two others that sum
to 516. To reach the magic sum, two quartets must be
selected from each group.