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A049375 as a triangular array

1
151
275301
5500775451
115500192501500601
2502500471625446252450751
55412500114950001254000850003625901
124678125027967500034093125269887514375050251051
283989062506802812500

A049375 as a square array

1152755500115500250250055412500124678125028398906250
13077519250471625114950002796750006802812500
145150044625125400034093125
1602450850002698875
1753625143750
1905025
1105
1
1152755500115500250250055412500124678125028398906250
13077519250471625114950002796750006802812500
145150044625125400034093125
1602450850002698875
1753625143750
1905025
1105
1