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A283500 as a triangular array

2
716
34265512
20973434150365536
154630418664747262499792133554432
13327175258121709852332212525573775736699744768719476736
130922133622125170299847537634215495252681252540841305558505874809287625

A283500 as a square array

2734209154613327130922
162657343304186175258121336221251
5124150364747261709852332702998475376
65536249979212125255737734215495252681
3355443257366997447252540841305558
68719476736505874809287625
2734209154613327130922
162657343304186175258121336221251
5124150364747261709852332702998475376
65536249979212125255737734215495252681
3355443257366997447252540841305558
68719476736505874809287625