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 A179569 #5 Jul 22 2025 08:18:29 %S A179569 0,0,0,0,1,7,142,1236,19389,197961,3119296,37007330,625269351, %T A179569 8518503575,156989400170,2424846690232,48850794161897,845427958969045 %N A179569 Number of permutations of 1..n with the number moved left exceeding the number moved right by 3 or more. %Y A179569 Equal number moved left and right, see A062868 %K A179569 nonn %O A179569 1,6 %A A179569 _R. H. Hardin_ Jul 19 2010