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”).

A097806 as a triangular array

1
11
011
0011
00011
000011
0000011
00000011
000000011
0000000011
00000000011
000000000011
0000000000011

A097806 as a square array

1100000000000
110000000000
11000000000
1100000000
110000000
11000000
1100000
110000
11000
1100
110
11
1
1100000000000
110000000000
11000000000
1100000000
110000000
11000000
1100000
110000
11000
1100
110
11
1