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A123245 as a triangular array

1
11
111
1121
12221
123331
1345431
13577641
147101110741
148131617141051
151118242624181151

A123245 as a square array

11111111111
1112233445
1223457811
12357101318
1347111624
136101726
1471424
141018
1511
15
1
11111111111
1112233445
1223457811
12357101318
1347111624
136101726
1471424
141018
1511
15
1