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A058400 as a triangular array

1
21
321
5431
76531
11109741
15141311841
22212018151051
3029282623181251
424140383530231461
56555452494437271661
7776757370655847341971
101

A058400 as a square array

1235711152230425677101
124610142129415576
1359132028405475
137111826385273
1481523354970
141018304465
1512233758
15142747
161634
1619
17
1
1235711152230425677101
124610142129415576
1359132028405475
137111826385273
1481523354970
141018304465
1512233758
15142747
161634
1619
17
1