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A121281 as a triangular array

1
21
632
3015106
210105704230
23101155770462330210
3003015015100106006429027302310
51051025525517017010210272930464103927030030
96996904849845323323019399381385670881790746130570570510510

A121281 as a square array

126302102310300305105109699690
13151051155150152552554849845
21070770100101701703233230
64246260061021021939938
303304290729301385670
210273046410881790
231039270746130
30030570570
510510
126302102310300305105109699690
13151051155150152552554849845
21070770100101701703233230
64246260061021021939938
303304290729301385670
210273046410881790
231039270746130
30030570570
510510