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A343516 as a triangular array

1
13
145
1588
1612159
1717261915
182342393513
19306474763420
1103893130153905621
111471302142872161526327
112571763345064683791918621

A343516 as a square array

11111111111
3456789101112
5812172330384757
81526426493130176
9193974130214334
153576153287506
133490216468
2056152379
2163191
2786
21
11111111111
3456789101112
5812172330384757
81526426493130176
9193974130214334
153576153287506
133490216468
2056152379
2163191
2786
21