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A131778 as a triangular array

1
61
161
6-4121
163121
6-924-2181
1602411181
6-1436-20606241
16-836156025241
6-1948-58126-1512020301

A131778 as a square array

1616161616
16-46-96-146-19
112324036-848
112-224-2036-58
118116015126
118660-15
12425120
12420
130
1
1616161616
16-46-96-146-19
112324036-848
112-224-2036-58
118116015126
118660-15
12425120
12420
130
1