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A253609 as a triangular array

2
43
659
14191115
2957944022
6517148326912423
13754925491996107118730
2771786

A253609 as a square array

246142965137277
3519571715491786
911944832549
15402691996
221241071
23187
30
246142965137277
3519571715491786
911944832549
15402691996
221241071
23187
30