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A191780 as a triangular array

1
31
141
5751
32961
75131171
182161381
91621191591
510102252217101
131914731292519111
34312236332821121
111371784341373123131
72211221424946413425141
157153

A191780 as a square array

13153719513311715
14725811019413227
15913261014371115
16111621271217223
17131925312814
1815222936432
191725334149
11019283746
111213141
1122334
11325
114
1
13153719513311715
14725811019413227
15913261014371115
16111621271217223
17131925312814
1815222936432
191725334149
11019283746
111213141
1122334
11325
114
1