SSD(10, 5^5), SSD(15, 5^5) and SSD(20, 5^5) via Theorem 8 (n=2, s=5, k=2,3,4)

0 0 0 0 0
1 1 1 1 1
2 2 2 2 2
3 3 3 3 3
4 4 4 4 4
0 1 2 3 4
1 2 3 4 0
2 3 4 0 1
3 4 0 1 2
4 0 1 2 3
0 2 4 1 3
1 3 0 2 4
2 4 1 3 0
3 0 2 4 1
4 1 3 0 2
0 3 1 4 2
1 4 2 0 3
2 0 3 1 4
3 1 4 2 0
4 2 0 3 1

Notes: (i) The first 10 rows form an SSD(10, 5^5) with overall A2=15 and all projected A2=3/2.
 (ii)  The first 15 rows form an SSD(15, 5^5) with overall A2=20/3 and all projected A2=2/3.
 (iii)  All rows form an SSD(20, 5^5) with overall A2=2.5 and all projected A2=1/4.