%I #3 Oct 14 2022 21:29:15

%S 3,11,15,23,35,36,39,44,51,63,75,83,95,99

%N Possible half-lengths of self-similar sequences over a finite alphabet that are invariant under retrograde inversion.

%C See Adler-Allouche (2022) for precise definition.

%D Christopher Adler and Jean-Paul Allouche (2022), Finite self-similar sequences, permutation cycles, and music composition, Journal of Mathematics and the Arts, 16:3, 244-261, DOI: 10.1080/17513472.2022.2116745.

%Y Cf. A357441.

%K nonn,more

%O 1,1

%A _N. J. A. Sloane_, Oct 14 2022