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A251962 as a triangular array

5484
1137511375
275502602727550
101307149744149744101307
417045120195321240171201953417045
1957438105094273076106730761067105094271957438
1004591094160979458358230736975310458358230

A251962 as a square array

54841137527550101307417045195743810045910
113752602714974412019531050942794160979
27550149744212401730761067458358230
101307120195330761067736975310
41704510509427458358230
1957438
54841137527550101307417045195743810045910
113752602714974412019531050942794160979
27550149744212401730761067458358230
101307120195330761067736975310
41704510509427458358230
1957438