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A303896 as a triangular array

0
11
171
223232
38654863
53132712713135
81145842165984211458
1341843420742174213420418413
211529311916397112947939711119161529321
345589545404195279200144200144195279

A303896 as a square array

0112358132134
172386313114541841529355895
1235427184234201191645404
2862711659742139711195279
3313842742129479200144
51145342039711200144
8418411916195279
1315293
21
0112358132134
172386313114541841529355895
1235427184234201191645404
2862711659742139711195279
3313842742129479200144
51145342039711200144
8418411916195279
1315293
21