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A223751 as a triangular array

6
2420
117200120
45628264800536
196226980330642745043378
76603082681230288021965901191870417362
3189729649406048218162762855184281037428137050508108534
1252403179947722711440400

A223751 as a square array

6241174561962766031897125240
20200282626980308268296494031799477
12048003306421230288060482181622711440400
53674504219659012762855184
337819187042810374281
1736237050508
108534
6241174561962766031897125240
20200282626980308268296494031799477
12048003306421230288060482181622711440400
53674504219659012762855184
337819187042810374281
1736237050508
108534