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A225597 as a triangular array

1
12
123
1335
13457
1457711
146891115
1571110151522
159121317192230
161016152221293042
16121819252632384256
1714232233294142545677

A225597 as a square array

111111111111
22334455667
3345679101214
55781112161823
7791013151922
11111517222533
151519212629
2222293241
30303842
424254
5656
77
111111111111
22334455667
3345679101214
55781112161823
7791013151922
11111517222533
151519212629
2222293241
30303842
424254
5656
77