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A088239 as a triangular array

0
12
123
0234
11344
022345
1122456
01133566
002244567
0113344678
11223355788
022224466789
1122335566899
01133445577

A088239 as a square array

01101010001010
2221211011211
333221212221
44323232223
4443433233
555443434
66545454
6665655
777665
88767
8887
99
9

A088239 as an upper right triangle

01101010001010
2221211011211
333221212221
44323232223
4443433233
555443434
66545454
6665655
777665
88767
8887
99
9

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Last modified August 7 19:57 EDT 2020. Contains 336279 sequences. (Running on oeis4.)