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A181843 as a triangular array

1
13
136
13812
1381823
138203238
13820386673
138204078110118
138204084141189198
138204086153253308318
138204086159287409519530
138204086161299476728807819

A181843 as a square array

111111111111
33333333333
6888888888
121820202020202020
2332384040404040
38667884868686
73110141153159161
118189253287299
198308409476
318519728
530807
819
111111111111
33333333333
6888888888
121820202020202020
2332384040404040
38667884868686
73110141153159161
118189253287299
198308409476
318519728
530807
819