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A143219 as a triangular array

1
26
3918
4122440
515305075
618366090126
7214270105147196
8244880120168224288
9275490135189252324405
103060100150210280360450550

A143219 as a square array

12345678910
6912151821242730
1824303642485460
405060708090100
7590105120135150
126147168189210
196224252280
288324360
405450
550
12345678910
6912151821242730
1824303642485460
405060708090100
7590105120135150
126147168189210
196224252280
288324360
405450
550