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A186686 as a triangular array

1
21
341
41061
3202181
1315636101
03812012055121
03821332222078141
030321724705364105161
017414140018971353560136181
064562364441042182366816171201
014273515902011374836538601140210221

A186686 as a square array

123431000000
141020313838301761
162156120213321414456427
1836120322724140023643515
11055220705189744109020
112783641353421811374
11410556023668365
1161368163860
1181711140
120210
122
1
123431000000
141020313838301761
162156120213321414456427
1836120322724140023643515
11055220705189744109020
112783641353421811374
11410556023668365
1161368163860
1181711140
120210
122
1