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 A209326 #31 Apr 04 2025 01:17:23 %S A209326 0,1,0,3,7,39,207,1437,11203,99041,975645,10601377,125905445, %T A209326 1622349059,22539777113,335845307359,5341990288103,90340567900583, %U A209326 1618553943500599,30623660893656205,610152486797080443,12769086757046132625,280037186109883699885,6422309829486480886809,153727262708736577446741,3833789797689152809143363 %N A209326 Number of permutations of [n] with a fixed point but no succession. %C A209326 A succession of a permutation p is a position i such that p(i+1)-p(i) = 1. %H A209326 Max Alekseyev, <a href="/A209326/b209326.txt">Table of n, a(n) for n = 0..30</a> %F A209326 a(n) = A000255(n-1) - A209322(n). - _Max Alekseyev_, Apr 03 2025 %e A209326 For n=4 we have 1324, 1432, 2431, 3214, 3241, 4132 and 4213. %Y A209326 Cf. A000166, A000255, A002467, A180191, A207819, A207821, A209322, A209325. %K A209326 nonn %O A209326 0,4 %A A209326 _Jon Perry_, Jan 19 2013 %E A209326 a(11)-a(14) from _Alois P. Heinz_, Jan 20 2013 %E A209326 a(15)-a(21) from _Alois P. Heinz_, Jul 04 2021 %E A209326 Terms a(22) onward from _Max Alekseyev_, Apr 03 2025