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A340351 as a triangular array

1
21
323
4361
54727
65123143
761441567
87155277141
98246281215215
1092873014193307
1110308311528431143
12113193924305431563
1312

A340351 as a square array

12345678910111213
123456789101112
36712141524283031
123456789
714152728303139
36712141524
71415192830
12345
15303143
71415
36
3
12345678910111213
123456789101112
36712141524283031
123456789
714152728303139
36712141524
71415192830
12345
15303143
71415
36
3