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 A215332 #9 Jun 17 2019 05:48:12 %S A215332 1,5,4,11,26,71,173,450,1132,2898,7393,18987,48796,125963,325786, %T A215332 845153,2197255,5725849,14950221,39110366,102488189,269002371, %U A215332 707090144,1861183842,4905157159,12942843383 %N A215332 Smooth Lyndon words with 5 colors. %C A215332 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 A215332 (See A215331). %Y A215332 Cf. A215332 (smooth necklaces, 5 colors), A215327 (smooth necklaces, 3 colors). %K A215332 nonn,more %O A215332 0,2 %A A215332 _Joerg Arndt_, Aug 08 2012 %E A215332 More terms from _Joerg Arndt_, Jun 17 2019