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”).

A204133 as a triangular array

1
11
121
1111
11411
111111
1118111
11111111
1111161111
1111111111
111113211111
111111111111
11111164111111
1111111

A204133 as a square array

11111111111111
1211111111111
114111111111
11181111111
11111611111
1111132111
111111641
111111
11111
1111
111
11
1
11111111111111
1211111111111
114111111111
11181111111
11111611111
1111132111
111111641
111111
11111
1111
111
11
1