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A287688 as a triangular array

2
67
101513
15212822
2128364532
283645556645
36455566789159
455566789110512076
5566789110512013615394
667891105120136153171190115
7891105120136153171190210231137

A287688 as a square array

26101521283645556678
7152128364555667891
1328364555667891105
224555667891105120
32667891105120136
4591105120136153
59120136153171
76153171190
94190210
115231
137
26101521283645556678
7152128364555667891
1328364555667891105
224555667891105120
32667891105120136
4591105120136153
59120136153171
76153171190
94190210
115231
137