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A360880 as a triangular array

1
20
410
6210
96310
121413410
16283922510
20521129839610
259328138323663810
3015265513041220515102910
36242140839805418351210771531110

A360880 as a square array

12469121620253036
012614285293152242
01313391122816551408
014229838313043980
0153923612205418
016635153512
0181021077
019153
0111
01
0
12469121620253036
012614285293152242
01313391122816551408
014229838313043980
0153923612205418
016635153512
0181021077
019153
0111
01
0