Source: Original.
Sums from 11 to 18: Sums from 9 to 16:
1 8 6 --> 15 3 1 8 --> 12
9 7 0 --> 16 9 2 0 --> 11
4 3 5 --> 12 4 6 5 --> 15
/ | | | \ / | | | \
/ | | | \ / | | | \
17 14 18 11 13 14 16 9 13 10
Interesting to note is that these two solutions are related - simply
subtract each entry from 9, then flip the square left-to-right. - KD
with elements picks from the set (1,2,4,5) ; (1,1,1,1,2,2,4,4,5) we can form a sequential Magic square | 1 2 1 | 4 | 4 1 4 | 9 | 1 2 5 | 8 ---------------- 3 | 6 5 10 | 7