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 A217328 #7 Oct 14 2012 17:52:49 %S A217328 1,8,71,461,3057,18225,109446,628652,3628517,20538209,116808172, %T A217328 659078098,3737763884,21153403644,120354760098,685455514294, %U A217328 3925104616303,22535893275064,130089736567064,753604985013128,4388755545268226,25660332309744370,150802834643569274 %N A217328 Number of self-inverse permutations in S_n with longest increasing subsequence of length 8. %C A217328 Also the number of Young tableaux with n cells and 8 rows. %H A217328 Alois P. Heinz, <a href="/A217328/b217328.txt">Table of n, a(n) for n = 8..400</a> %F A217328 a(n) = A182172(n,8)-A182172(n,7) = A007580(n)-A007578(n). %e A217328 a(8) = 1: 12345678. %e A217328 a(9) = 8: 123456798, 123456879, 123457689, 123465789, 123546789, 124356789, 132456789, 213456789. %Y A217328 Column k=8 of A047884. %Y A217328 Cf. A007578, A007580, A182172. %K A217328 nonn %O A217328 8,2 %A A217328 _Alois P. Heinz_, Sep 30 2012