login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A193278 as a triangular array

1
21
321
4231
52241
632251
7233261
84222371
923442281
10532223491
1122355322101
12643222235111
1323426

A193278 as a square array

12345678910111213
122232425262
13223233243
1423242334
152242522
16322526
172332
18422
1923
1105
111
1
12345678910111213
122232425262
13223233243
1423242334
152242522
16322526
172332
18422
1923
1105
111
1