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A191711 as a triangular array

1
24
369
581214
711161819
101521232524
13202730323129
1726353841403734
223345485251474339
28425761666560555044
3653727783827670635649
46

A191711 as a square array

1235710131722283646
46811152026334253
91216212735455772
1418233038486177
19253241526683
243140516582
2937476076
34435570
395063
4456
49
1235710131722283646
46811152026334253
91216212735455772
1418233038486177
19253241526683
243140516582
2937476076
34435570
395063
4456
49