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A209574 as a triangular array

1
23
375
414207
52452459
6371101558611
75320340338914713
872340882124085623215
994530171232043322170234517
1011978230407170100887962312549019
111471105

A209574 as a square array

1234567891011
37142437537294119147
520521102033405307821105
74515540388217123040
986389124032047170
11147856332210088
1323217027962
153453125
17490
19
1234567891011
37142437537294119147
520521102033405307821105
74515540388217123040
986389124032047170
11147856332210088
1323217027962
153453125
17490
19