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 A086589 #5 May 18 2024 18:36:33 %S A086589 1,1,2,5,12,27,60,127,264,541,1104,2229,4492 %N A086589 Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutations A072088/A072089. %K A086589 nonn,more %O A086589 0,3 %A A086589 _Antti Karttunen_, Jun 23 2003