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A184720 as a triangular array

1
11
112
1122
11223
112254
1122795
1123619226
112262239478
112220391251209510
1123156520946741119712
112318763569471669131039415
112429114

A184720 as a square array

1111111111111
111111111111
22222222222
2222322334
3576620151829
491922396576114
52239125209356
647120467947
8954111669
101971310
12394
15

A184720 as an upper right triangle

1111111111111
111111111111
22222222222
2222322334
3576620151829
491922396576114
52239125209356
647120467947
8954111669
101971310
12394
15

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Last modified May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)