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A203994 as a triangular array

1
00
-11-1
-200-2
-3-11-1-3
-4-200-2-4
-5-3-11-1-3-5
-6-4-200-2-4-6
-7-5-3-11-1-3-5-7
-8-6-4-200-2-4-6-8
-9-7-5-3-11-1-3-5-7-9

A203994 as a square array

10-1-2-3-4-5-6-7-8-9
010-1-2-3-4-5-6-7
-1010-1-2-3-4-5
-2-1010-1-2-3
-3-2-1010-1
-4-3-2-101
-5-4-3-2-1
-6-5-4-3
-7-6-5
-8-7
-9
10-1-2-3-4-5-6-7-8-9
010-1-2-3-4-5-6-7
-1010-1-2-3-4-5
-2-1010-1-2-3
-3-2-1010-1
-4-3-2-101
-5-4-3-2-1
-6-5-4-3
-7-6-5
-8-7
-9