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”).

A280042 as a simple table

na(n)
11
211
31101
41101011
511010111101
61101011111201011
71101011111212021111101
811010111112121312122121201011
91101011111212132313223231313121111101
101101011111212132324233342425242423223121201011

[1,11,1101,1101011,11010111101,1101011111201011,
 1101011111212021111101,
 11010111112121312122121201011,
 1101011111212132313223231313121111101,
 1101011111212132324233342425242423223121201011]