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A259100 as a triangular array

1
01
021
0321
04521
058521
061410521
07201810521
0830302010521

A259100 as a square array

100000000
12345678
1258142030
125101830
1251020
12510
125
12
1
100000000
12345678
1258142030
125101830
1251020
12510
125
12
1