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A235531 as a triangular array

81
498498
299669542996
1578210268710268715782
8058412412514295649124125180584
3880081456461314061440014061440014564613388008
18195371523351684492923265130385765124492923265152335168

A235531 as a square array

81498299615782805843880081819537
4986954102687124125114564613152335168
299610268742956491406144004492923265
15782124125114061440013038576512
80584145646134492923265
388008152335168
81498299615782805843880081819537
4986954102687124125114564613152335168
299610268742956491406144004492923265
15782124125114061440013038576512
80584145646134492923265
388008152335168