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A171871 as a triangular array

1
01
001
0012
00033
0003176
0001367411
00016057335823
00005628027311163147
00005010087107938831707563106
000027265121186969312184086665734751235
000019

A171871 as a square array

100000000000
10000000000
1100000000
233110000
317366056502719
67457328021008726512
1135873111079381186969
231631831703121840
477563866657
10634751
235
100000000000
10000000000
1100000000
233110000
317366056502719
67457328021008726512
1135873111079381186969
231631831703121840
477563866657
10634751
235