This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A220080 #52 Dec 22 2023 14:17:42 %S A220080 0,1,1,2,4,3,3,2,4,2,4,6,8,10,12,14,16,6,8,10,12,6,8,10,12,2,4,6,8,10, %T A220080 12,14,16,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42, %U A220080 44,46,48,50,52,54 %N A220080 Length of longest palindromic suffix of the prefix of length n of the Thue-Morse sequence (A010060). %H A220080 Alois P. Heinz, <a href="/A220080/b220080.txt">Table of n, a(n) for n = 0..8192</a> %H A220080 A. Blondin-Massé, S. Brlek, A. Garon, and S. Labbé, <a href="http://www.slabbe.org/Publications/2008-ThueMorseLacunas.pdf">Combinatorial properties of f-palindromes in the Thue-Morse Sequence</a>, Pure. Math. Appl., 19 (2-3) (2008), 39-52. %e A220080 a(3) = 2 because the prefix of length 3 of the Thue-Morse sequence is 011, and the longest palindromic suffix of 011 is 11, which is of length 2. %Y A220080 Cf. A010060. %K A220080 nonn %O A220080 0,4 %A A220080 _Jeffrey Shallit_, Feb 19 2013