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”).

A280105 as a simple table

na(n)
110
210
311
4101
51011
610011
7101001
81001001
910001011
10100000001
11111001101
121100111011
1310110111111
14101000011111
151000110001101
161111001110001
1711010010011101
18101101001110111
191001101101100011
2010000100101011011
2111100010001110111
22110000000001001111

[10,10,11,101,1011,10011,101001,1001001,10001011,
 100000001,111001101,1100111011,10110111111,
 101000011111,1000110001101,1111001110001,
 11010010011101,101101001110111,1001101101100011,
 10000100101011011,11100010001110111,
 110000000001001111]