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A257569 as a triangular array

0
12
334
4455
55566
666677
6767787
77778888
787879898
8888889999
8989898109109
9999999910101010
8109108

A257569 as a square array

0134566778898
2345677889910
45566778899
56677889910
677878898
7889899
788989
899109
89910
91010
910
10

A257569 as an upper right triangle

0134566778898
2345677889910
45566778899
56677889910
677878898
7889899
788989
899109
89910
91010
910
10

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Last modified April 18 10:44 EDT 2019. Contains 322209 sequences. (Running on oeis4.)