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A264731 as a triangular array

2
35
71311
19372917
5389714323
1312231731076131
3115034092631517941
719116394161335919310147
161926572129142382745723911359
36715849475131671877104956928113967

A264731 as a square array

237195313131171916193671
5133789223503116326575849
11297117340994121294751
174310726361314233167
23611513598271877
31791934571049
41101239569
47113281
59139
67
237195313131171916193671
5133789223503116326575849
11297117340994121294751
174310726361314233167
23611513598271877
31791934571049
41101239569
47113281
59139
67