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A321126 as a triangular array

1
22
323
4334
54345
654456
7655567
87666678
987777789
109888888910
111099999991011
121110101010101010101112
13121111111111111111111213

A321126 as a square array

12345678910111213
223456789101112
3334567891011
444567891011
55567891011
6667891011
777891011
88891011
9991011
10101011
111111
1212
13
12345678910111213
223456789101112
3334567891011
444567891011
55567891011
6667891011
777891011
88891011
9991011
10101011
111111
1212
13