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 A211367 #9 Jul 13 2012 17:34:52 %S A211367 1,2,16,6,60,450,24,288,2592,23616,120,1680,17640,184800,2045400,720, %T A211367 11520,138240,1635840,20188800,263727360,5040,90720,1224720,16148160, %U A211367 219769200,3137732640,47249833680,40320,806400,12096000,175795200 %N A211367 Array read by antidiagonals: T(m,n) = m * Sum(1<=i<=m) (m+n-2+i)! %C A211367 Index numbers (compare A055089) of chains of transpositions. %H A211367 Tilman Piesk, <a href="/A211367/b211367.txt">Table of n, a(n) for n = 1..2016</a> %H A211367 Tilman Piesk, <a href="http://en.wikiversity.org/wiki/Inversion_%28discrete_mathematics%29#arrays2">Arrays of permutations</a> (Wikiversity) %e A211367 T(3,2) = 3 * Sum( 1 <= i <= 3 ) [ (3+i)! ] %e A211367 = 3 * ( (3+1)! + (3+2)! + (3+3)! ) %e A211367 = 3 * ( 24 + 120 + 720 ) %e A211367 = 2592 %Y A211367 Cf. A055089. %K A211367 nonn,tabl %O A211367 1,2 %A A211367 _Tilman Piesk_, Jul 07 2012