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 A269124 #6 Mar 02 2016 21:19:47 %S A269124 1,719,7235651,117108036719,2169397142273171,41489887418194798439, %T A269124 791857392420720220446647,14919265746950486383601562197, %U A269124 276745258345325814650980975177139,5055320871467502855510583170028558565,91050643996464879303067913358954122530151 %N A269124 Number of sequences with n copies each of 1,2,...,6 avoiding the pattern 12...6. %H A269124 Alois P. Heinz, <a href="/A269124/b269124.txt">Table of n, a(n) for n = 0..100</a> %F A269124 a(n) = A008979(n) - A268842(n). %Y A269124 Row n=6 of A269129. %Y A269124 Cf. A008979, A268842. %K A269124 nonn %O A269124 0,2 %A A269124 _Alois P. Heinz_, Feb 19 2016