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A209599 as a triangular array

1
20
310
5300
87100
13154000
2130121000
34583150000
55109731810000
8920116254600000
14436534414525100000

A209599 as a square array

123581321345589144
0137153058109201365
0014123173162344
000151854145
00001625
000001
00000
0000
000
00
0
123581321345589144
0137153058109201365
0014123173162344
000151854145
00001625
000001
00000
0000
000
00
0