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A261292 as a triangular array

36
5050
967796
166133133166
307233271233307
540409504504409540
10157431086114710867431015
17861361210425862586210413611786
330424694715603469966034471524693304
586244859080

A261292 as a square array

3650961663075401015178633045862
5077133233409743136124694485
961332715041086210447159080
166233504114725866034
307409108625866996
54074321046034
101513614715
17862469
3304
3650961663075401015178633045862
5077133233409743136124694485
961332715041086210447159080
166233504114725866034
307409108625866996
54074321046034
101513614715
17862469
3304