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A305873 as a triangular array

1
35
156560
10580417301105
94510824391105564527120
1039516235785425019872702105070828250
135135271444519180410638975501088786109169255030220800
20270255030136045298453220044350964836052370647971444045237101001282031525

A305873 as a square array

1315105945103951351352027025
56580410824162357271444550301360
6017303911085425019180410452984532
1105556451987270638975502004435096
2712021050701088786104836052370
828250916925506479714440
302208004523710100
1282031525
1315105945103951351352027025
56580410824162357271444550301360
6017303911085425019180410452984532
1105556451987270638975502004435096
2712021050701088786104836052370
828250916925506479714440
302208004523710100
1282031525