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A252500 as a triangular array

12256
201803201803
361084082008693610840
6362998137954904837954904863629981
11091225521612152238543375710311161215223851109122552
1935789529668848876534545434452145874543445214587

A252500 as a square array

12256201803361084063629981110912255219357895296
201803820086937954904816121522385688488765345
3610840379549048433757103114543445214587
63629981161215223854543445214587
1109122552
12256201803361084063629981110912255219357895296
201803820086937954904816121522385688488765345
3610840379549048433757103114543445214587
63629981161215223854543445214587
1109122552