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A238731 as a triangular array

1
11
241
51371
134033101
3412013262131
89354483308100161
233103116711345595147191
61029725561539830301020203221
1597849517984204101389359431610268251
4181

A238731 as a square array

112513348923361015974181
141340120354103129728495
17331324831671556117984
110623081345539820410
113100595303013893
11614710205943
1192031610
122268
125
1
112513348923361015974181
141340120354103129728495
17331324831671556117984
110623081345539820410
113100595303013893
11614710205943
1192031610
122268
125
1