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 A269115 #9 Mar 02 2016 21:12:46 %S A269115 0,0,1,26945,1474050783,173996758190594,41489887418194798439, %T A269115 18675035107760751336633904,15006398706095549205738572240519, %U A269115 20584293980310480336378076914369061769,46436573450646384263588550418764923934014699 %N A269115 Number of sequences with 5 copies each of 1,2,...,n avoiding the pattern 12...n. %H A269115 Alois P. Heinz, <a href="/A269115/b269115.txt">Table of n, a(n) for n = 0..100</a> %F A269115 a(n) = A014609(n) - A268848(n). %Y A269115 Column k=5 of A269129. %Y A269115 Cf. A014609, A268848. %K A269115 nonn %O A269115 0,4 %A A269115 _Alois P. Heinz_, Feb 19 2016