55574528

Appears in sequences

• Lexicographically earliest sequence such that (i) the binary plot of the sequence is symmetric with respect to the line y=x and (ii) the derived sequence (A000265(a(n))) contains only distinct terms.at n=24A240972
• Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate at the empty word.at n=26A291780