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 A177428 #5 May 15 2016 23:36:46 %S A177428 1,1,1,1,8,2,1,33,66,6,1,104,792,624,24,1,285,6040,18120,6840,120,1, %T A177428 720,35730,289920,428760,86400,720,1,1729,180306,3279990,13119960, %U A177428 10818360,1244880,5040,1,4016,818048,29646624,262399200,592932480,294497280 %N A177428 Triangle T(n,m)= A141686(n,m)*(m-1)! read by rows, n>=1, 1<=m<=n. %C A177428 Row sums are 1, 2, 11, 106, 1545, 31406, 842251, 28650266, 1200578609, 60585995422, %C A177428 3615590440731,.... %F A177428 T(n,m)= A008292(n,m)*(n-1)!/(n-m)!. %e A177428 1; %e A177428 1, 1; %e A177428 1, 8, 2; %e A177428 1, 33, 66, 6; %e A177428 1, 104, 792, 624, 24; %e A177428 1, 285, 6040, 18120, 6840, 120; %e A177428 1, 720, 35730, 289920, 428760, 86400, 720; %e A177428 1, 1729, 180306, 3279990, 13119960, 10818360, 1244880, 5040; %p A177428 A177428 := proc(n,k) %p A177428 A008292(n,k)*(n-1)!/(n-k)! ; %p A177428 end proc: # _R. J. Mathar_, May 15 2016 %t A177428 << DiscreteMath`Combinatorica` %t A177428 t[n_, m_] = Eulerian[n + 1, m]*n!/(n - m)!; %t A177428 Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}]; %t A177428 Flatten[%] %K A177428 nonn,tabl %O A177428 1,5 %A A177428 _Roger L. Bagula_, May 08 2010 %E A177428 Edited by _R. J. Mathar_, May 15 2016