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A354586 as a triangular array

1
22
333
4444
55155
666666
7777777
88888888
995919599
101010102210101010
1111111133311111111
121212121212121212121212

A354586 as a square array

123456789101112
23456789101112
3416785101112
456789101112
567812312
67892312
78510312
89101112
9101112
101112
1112
12
123456789101112
23456789101112
3416785101112
456789101112
567812312
67892312
78510312
89101112
9101112
101112
1112
12