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”).

A213061 as a triangular array

1
01
011
0111
01101
011101
0110111
01110011
011010001
0111010001
01101110011
011100110111
0110100011101
01110100001101
011011100000111

A213061 as a square array

100000000000000
11111111111111
1111111111111
101010101010
10101010101
1100110011
110011001
10001000
1000100
111100
11110
1010
101
11
1
100000000000000
11111111111111
1111111111111
101010101010
10101010101
1100110011
110011001
10001000
1000100
111100
11110
1010
101
11
1