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 A181416 #4 Mar 31 2012 13:23:39 %S A181416 1,2,4,6,12,18,24,32,16,72,96,120,120,120,180,180,480,600,720,576,576, %T A181416 288,648,1296,216,1152,1728,3600,4320,5040,3360,3360,3360,3024,6048, %U A181416 3024,3024,4032,12096,4032,8400,16800,30240,35280,40320 %N A181416 Irregular table T(n,k) = n*A178883(n,k) read by rows. %C A181416 The row sum of row n is A001286(n). %F A181416 T(n,k) = A036042(n,k)*A178883(n,k), 1<=k<= A000041(n). %e A181416 In row n=3 the products are (3,3,3) times (2,4,6) yielding (6,12,18) which adds to 36, the third Lah number. %e A181416 The table starts in row n=1 with row lengths A000041(n) as: %e A181416 1; %e A181416 2,4; %e A181416 6,12,18; %e A181416 24,32,16,72,96; %e A181416 120,120,120,180,180,480,600; %Y A181416 Cf. A051683. %K A181416 easy,nonn,tabf %O A181416 1,2 %A A181416 _Alford Arnold_, Oct 17 2010