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 A215334 #8 Jun 17 2019 05:53:49 %S A215334 1,7,6,17,42,119,305,829,2196,5907,15863,42842,115845,314368,854647, %T A215334 2329087,6358855,17393327,47652117,130752969,359270784,988458115, %U A215334 2722792878 %N A215334 Smooth Lyndon words with 7 colors. %C A215334 We call a Lyndon word (x[1],x[2],...,x[n]) smooth if abs(x[k]-x[k-1]) <= 1 for 2<=k<=n. %e A215334 (See A215333). %Y A215334 Cf. A215328 (smooth Lyndon words, 3 colors), A215327 (smooth necklaces, 3 colors). %K A215334 nonn,more %O A215334 0,2 %A A215334 _Joerg Arndt_, Aug 08 2012 %E A215334 More terms from _Joerg Arndt_, Jun 17 2019