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A206577 as a triangular array

4
1616
6125661
23237213721232
8825382418869953824882
3353777924950975095097507779243353
127471124260947845689616654311644784568961124260912747
4846016248600924071410239290967246344

A206577 as a square array

4166123288233531274748460
1625637215382477792411242609162486009
613721188699950975047845689624071410239
2325382495097501665431164290967246344
882777924478456896
335311242609
12747
4166123288233531274748460
1625637215382477792411242609162486009
613721188699950975047845689624071410239
2325382495097501665431164290967246344
882777924478456896
335311242609
12747