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A134403 as a triangular array

0
11
223
3345
44567
556789
667891011
778910111213
889101112131415
991011121314151617
1010111213141516171819
11111213141516

A134403 as a square array

01234567891011
1234567891011
3456789101112
5678910111213
7891011121314
9101112131415
111213141516
13141516
151617
1718
19
01234567891011
1234567891011
3456789101112
5678910111213
7891011121314
9101112131415
111213141516
13141516
151617
1718
19