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A162609 as a triangular array

1
11
123
1357
1471013
159131721
161116212631
17131925313743
1815222936435057
191725334149576573
110192837465564738291
11121314151617181

A162609 as a square array

111111111111
1234567891011
3579111315171921
71013161922252831
1317212529333741
21263136414651
313743495561
4350576471
57657381
7382
91
111111111111
1234567891011
3579111315171921
71013161922252831
1317212529333741
21263136414651
313743495561
4350576471
57657381
7382
91