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A046540 as a triangular array

1
11
131
1331
13331
131131
1331331
13333331
131131131
1331331331
13333333331
131111111131
133111111

A046540 as a square array

1111111111111
133333333333
13313313313
1311311311
133333311
13313311
1311311
133311
13311
131
13
1

A046540 as an upper right triangle

1111111111111
133333333333
13313313313
1311311311
133333311
13313311
1311311
133311
13311
131
13
1

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Last modified June 20 17:43 EDT 2021. Contains 345199 sequences. (Running on oeis4.)