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A338994 as a triangular array

2
2021
191920
15181016
1018181011
1091491611
89171415169
1415171714151511
141481791491511
8141413991315159
1315141389914151514
81281316891314979
9158

A338994 as a square array

220191510108141481389
2119181899151414151215
2010181417178141488
16109141717131313
1116151499816
11161514998
91591399
1115151413
11151514
9159
147
9
220191510108141481389
2119181899151414151215
2010181417178141488
16109141717131313
1116151499816
11161514998
91591399
1115151413
11151514
9159
147
9