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”).

A071024 as a triangular array

1
11
111
1011
10111
101011
1010111
10101011
101010111
1010101011
10101010111
101010101011
1010101010111
10101010

A071024 as a square array

11111111111111
1100000000000
111111111111
11000000000
1111111111
110000000
11111111
1100000
11111
1100
111
11
1
11111111111111
1100000000000
111111111111
11000000000
1111111111
110000000
11111111
1100000
11111
1100
111
11
1