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A204030 as a triangular array

2
11
232
1111
21412
131131
2125212
11111111
234161432
1111111111
21212721212
131531135131
2141218121412
11111111

A204030 as a square array

21212121212121
1311311311311
214121412141
11151111511
2321612321
111117111
21412181
1311311
21252
1111
234
11
2

A204030 as an upper right triangle

21212121212121
1311311311311
214121412141
11151111511
2321612321
111117111
21412181
1311311
21252
1111
234
11
2

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)