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A209439 as a triangular array

1
21
421
7421
138421
24168421
4428168421
814932168421
149916432168421
2741691126432168421
5043121961286432168421
927576343256128

A209439 as a square array

124713244481149274504927
124816284991169312576
1248163264112196343
1248163264128256
1248163264128
12481632
124816
1248
124
12
1
124713244481149274504927
124816284991169312576
1248163264112196343
1248163264128256
1248163264128
12481632
124816
1248
124
12
1