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 A264454 #4 Nov 14 2015 07:44:09 %S A264454 1,24,337,3798,38795,379611,3659389,35291284,343556139,3394140548, %T A264454 34141603945,350367304972,3672490264985,39344027488644, %U A264454 430933818393770,4825995839698429,55254816421477438,646659542446548212,7733703865241542989,94486241595833611364 %N A264454 Number of permutations of [n] with exactly five (possibly overlapping) occurrences of the generalized pattern 12-3. %H A264454 Alois P. Heinz, <a href="/A264454/b264454.txt">Table of n, a(n) for n = 5..500</a> %Y A264454 Column k=5 of A260665. %K A264454 nonn %O A264454 5,2 %A A264454 _Alois P. Heinz_, Nov 14 2015