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A375825 as a triangular array

1
21
213
3241
42513
426135
4261357
53724681
648257913
74926810135
8410269111357
841126101213579
84122610131357911

A375825 as a square array

1223444567888
112222344444
34566789101112
1111222222
333456666
5567891010
78910111213
111111
33333
5555
777
99
11
1223444567888
112222344444
34566789101112
1111222222
333456666
5567891010
78910111213
111111
33333
5555
777
99
11