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 A354384 #19 Aug 06 2022 08:08:06 %S A354384 2,3,4,2,4,3,2,3,4,3,2,4,2,3,4,2,4,3,2,4,2,3,4,3,2,3,4,2,4,3,2,3,4,3, %T A354384 2,4,2,3,4,3,2,3,4,2,4,3,2,4,2,3,4,2,4,3,2,3,4,3,2,4,2,3,4,2,4,3,2,4, %U A354384 2,3,4,3,2,3,4,2,4,3,2,4,2,3,4,2,4,3 %N A354384 Difference sequence of A356133. %F A354384 a(n) = A007413(n) + 1. %F A354384 a(n) = A036580(n) + 2. %t A354384 u = Accumulate[1 + ThueMorse /@ Range[0, 200]] (* A026430 *) %t A354384 v = Complement[Range[Max[u]], u]; (* A356133 *) %t A354384 Differences[v] (* A354384 *) %Y A354384 Cf. A026430, A356133, A091855 (positions of 2), A036554 (positions of 3), A091855 (positions of 4). %K A354384 nonn,easy %O A354384 1,1 %A A354384 _Clark Kimberling_, Aug 04 2022