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A066181 as a triangular array

1
32
564
89107
1213141511
171819202116
23242526272822
3031323334353629
383940414243444537
47484950515253545546
5758596061626364656656
686970717273

A066181 as a square array

13581217233038475768
2691318243139485869
4101419253240495970
71520263341506071
1121273442516172
16283543526273
2236445363
29455464
375565
4666
56
13581217233038475768
2691318243139485869
4101419253240495970
71520263341506071
1121273442516172
16283543526273
2236445363
29455464
375565
4666
56