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A138243 as a triangular array

1
21
231
1111
23511
111111
2317111
11111111
235111111
1111111111
231111111111
111111111111
23571131111111
11111111111111

A138243 as a square array

12212121212121
1313131313131
115111511151
11171111171
11111111111
1111111131
11111111
1111111
111111
11111
1111
111
11
1

A138243 as an upper right triangle

12212121212121
1313131313131
115111511151
11171111171
11111111111
1111111131
11111111
1111111
111111
11111
1111
111
11
1

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Last modified March 28 07:48 EDT 2024. Contains 371235 sequences. (Running on oeis4.)