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A251989 as a triangular array

2735
2001120011
151635231559151635
1182549306928330692831182549
93759014395751579998655439575159375901
751531616638147412351304453235130445366381474175153161
60757925510354206421

A251989 as a square array

2735200111516351182549937590175153161607579255
2001123155930692834395751566381474110354206421
1516353069283799986552351304453
1182549439575152351304453
9375901663814741
75153161
2735200111516351182549937590175153161607579255
2001123155930692834395751566381474110354206421
1516353069283799986552351304453
1182549439575152351304453
9375901663814741
75153161