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A257624 as a triangular array

1
55
258025
125915915125
6259070201309070625
312583185348410348410831853125
1562572798052466559755480524665572798015625
7812561832157227280522576985522576985572272805618321578125

A257624 as a square array

152512562531251562578125
5809159070831857279806183215
2591520130348410524665572272805
12590703484109755480225769855
625831855246655225769855
312572798072272805
156256183215
78125
152512562531251562578125
5809159070831857279806183215
2591520130348410524665572272805
12590703484109755480225769855
625831855246655225769855
312572798072272805
156256183215
78125