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A210551 as a triangular array

1
31
561
715101
92835151
11458470211
1366165210126281
1591286495462210361
1712045510011287924330451
191536801820300330031716495551
2119096930606188

A210551 as a square array

13579111315171921
161528456691120153190
1103584165286455680969
11570210495100118203060
121126462128730036188
1282109243003
1363301716
145495
155
1
13579111315171921
161528456691120153190
1103584165286455680969
11570210495100118203060
121126462128730036188
1282109243003
1363301716
145495
155
1