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”).

A273693 as a triangular array

1
11
110
1110
11110
111210
1112310
11126810
11126122010
1112624408010
11126246018021010
111262412024063089610
111262412036012603360336010

A273693 as a square array

1111111111111
111111111111
01111111111
0122222222
013666666
0181224242424
01204060120120
0180180240360
012106301260
018963360
013360
01
0
1111111111111
111111111111
01111111111
0122222222
013666666
0181224242424
01204060120120
0180180240360
012106301260
018963360
013360
01
0