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 A215328 #12 Jun 17 2019 05:36:38 %S A215328 1,3,2,5,10,24,49,112,240,534,1175,2626,5848,13153,29594,66955,151814, %T A215328 345494,788049,1802675,4132469,9495242,21859912,50423465,116511119, %U A215328 269666586,625101288,1451128164,3373250909,7851415835 %N A215328 Smooth Lyndon words with 3 colors. %C A215328 We call a Lyndon word (x[1],x[2],...,x[n]) smooth if abs(x[k]-x[k-1]) <= 1 for 2<=k<=n. %C A215328 All binary Lyndon words (2 colors, A001037) are necessarily smooth. %e A215328 (See A215327). %Y A215328 Cf. A027376 (Lyndon words, 3 colors), A215327 (smooth necklaces, 3 colors). %K A215328 nonn %O A215328 0,2 %A A215328 _Joerg Arndt_, Aug 08 2012 %E A215328 More terms from _Joerg Arndt_, Jun 17 2019