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A258566 as a triangular array

1
32
15106
105704230
1155770462330210
15015100106006429027302310
25525517017010210272930464103927030030
4849845323323019399381385670881790746130570570510510

A258566 as a square array

13151051155150152552554849845
21070770100101701703233230
64246260061021021939938
303304290729301385670
210273046410881790
231039270746130
30030570570
510510
13151051155150152552554849845
21070770100101701703233230
64246260061021021939938
303304290729301385670
210273046410881790
231039270746130
30030570570
510510