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A087061 as a triangular array

0
11
212
3223
43234
543345
6543456
76544567
876545678
9876556789
1098765678910
1111987667891111
1211129876789121112
1312121398

A087061 as a square array

012345678910111213
1123456789111112
22234567891212
333345678913
4444456789
555555678
6666666
777777
88888
9999
101112
1111
12

A087061 as an upper right triangle

012345678910111213
1123456789111112
22234567891212
333345678913
4444456789
555555678
6666666
777777
88888
9999
101112
1111
12

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Last modified August 19 07:06 EDT 2019. Contains 326115 sequences. (Running on oeis4.)