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A005145 as a triangular array

2
33
555
7777
1111111111
131313131313
17171717171717
1919191919191919
232323232323232323
29292929292929292929
3131313131313131313131

A005145 as a square array

235711131719232931
35711131719232931
5711131719232931
711131719232931
11131719232931
131719232931
1719232931
19232931
232931
2931
31
235711131719232931
35711131719232931
5711131719232931
711131719232931
11131719232931
131719232931
1719232931
19232931
232931
2931
31