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A289236 as a triangular array

1
22
313
4444
52125
666666
7371737
88288288
949414949
10101010101010101010
115321111123511
121212121212121212121212

A289236 as a square array

123456789101112
2142638410512
341672910312
42618410212
56781101112
632410112
789101112
8410212
910312
10512
1112
12
123456789101112
2142638410512
341672910312
42618410212
56781101112
632410112
789101112
8410212
910312
10512
1112
12