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 A269119 #6 Mar 02 2016 21:06:44 %S A269119 0,0,1,123700631,88094027572412735,327305762373962750213344469, %T A269119 5055320871467502855510583170028558565, %U A269119 268568796699793322439632085075432144258760935329,42306180849230219227948320734391059740469458805515898752511 %N A269119 Number of sequences with 9 copies each of 1,2,...,n avoiding the pattern 12...n. %H A269119 Alois P. Heinz, <a href="/A269119/b269119.txt">Table of n, a(n) for n = 0..65</a> %F A269119 a(n) = A172613(n) - A268852(n). %Y A269119 Column k=9 of A269129. %Y A269119 Cf. A172613, A268852. %K A269119 nonn %O A269119 0,4 %A A269119 _Alois P. Heinz_, Feb 19 2016