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A260910 as a triangular array

-1
13
5711
11172329
1923273139
2949597989109
41475359657183
55698397111125139153
717995103119127143151167
89107143161179197233251269287
109119129139

A260910 as a square array

-11511192941557189109
37172349476979107119
11232759538395143129
2931795997103161139
398965111119179
10971125127197
83139143233
153151251
167269
287
-11511192941557189109
37172349476979107119
11232759538395143129
2931795997103161139
398965111119179
10971125127197
83139143233
153151251
167269
287