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 A269118 #6 Mar 02 2016 21:07:59 %S A269118 0,0,1,15168751,1020149742404727,285867869484243410805931, %T A269118 276745258345325814650980975177139, %U A269118 789007694236868030155290867470985247486401,5841526335200139692050292842849347521755651331941759,101741646114927245552012617872560516024563394870390766150081895 %N A269118 Number of sequences with 8 copies each of 1,2,...,n avoiding the pattern 12...n. %H A269118 Alois P. Heinz, <a href="/A269118/b269118.txt">Table of n, a(n) for n = 0..70</a> %F A269118 a(n) = A172609(n) - A268851(n). %Y A269118 Column k=8 of A269129. %Y A269118 Cf. A172609, A268851. %K A269118 nonn %O A269118 0,4 %A A269118 _Alois P. Heinz_, Feb 19 2016