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 A221145 #11 Oct 28 2024 15:57:11 %S A221145 1,0,0,8,30,144,1120,9120,80892,808640,8908416,106889760,1389405160, %T A221145 19452003648,291782125440,4668506495744,79364583206160, %U A221145 1428562661736960,27142690917071872,542853814698737280,11399930105272855776,250798462399704792320 %N A221145 a(n) is the number of permutations of n elements with exactly one fixed point and no transpositions. %F A221145 Equals n*A038205(n-1). - _Giovanni Resta_, Nov 13 2012 %e A221145 For n = 4 the a(4) = 8 solutions are (123), (124), (132), (134), (142), (143), (234), (243) %Y A221145 Cf. A038205. %Y A221145 Column k=1 of A344901. %K A221145 nonn %O A221145 1,4 %A A221145 _James Mahoney_, Nov 13 2012 %E A221145 Edited by _N. J. A. Sloane_, Jan 03 2013