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A083486 as a triangular array

1
28
3412
45630
5678105
678910210
7891011121155
89101112131430030
9101112131415161001
10111213141516171834034
11121314151617181920323323
121314151617

A083486 as a square array

123456789101112
845678910111213
1267891011121314
3089101112131415
10510111213141516
210121314151617
115514151617
30030161718
10011819
3403420
323323
123456789101112
845678910111213
1267891011121314
3089101112131415
10510111213141516
210121314151617
115514151617
30030161718
10011819
3403420
323323