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 A107044 #10 Sep 08 2013 19:59:14 %S A107044 1,1,1,1,2,1,1,2,2,1,1,2,6,2,1,1,2,6,6,2,1,1,2,6,24,6,2,1,1,2,6,24,24, %T A107044 6,2,1,1,2,6,24,120,24,6,2,1,1,2,6,24,120,120,24,6,2,1,1,2,6,24,120, %U A107044 720,120,24,6,2,1,1,2,6,24,120,720,720,120,24,6,2,1 %N A107044 A symmetric factorial triangle, read by rows: T(n,k) = min(n,k)!. %F A107044 Given A003983, replace each term with its factorial. %e A107044 First few rows of the triangle are: %e A107044 1 %e A107044 1, 1 %e A107044 1, 2, 1 %e A107044 1, 2, 2, 1 %e A107044 1, 2, 6, 2, 1 %e A107044 1, 2, 6, 6, 2, 1 %e A107044 1, 2, 6, 24, 6, 2, 1 ... %e A107044 Row having (1, 2, 3, 2, 1) in A003983 is replaced by (1, 2, 6, 2, 1) in A107044. %Y A107044 Cf. A003983. %K A107044 nonn,tabl %O A107044 1,5 %A A107044 _Gary W. Adamson_, May 09 2005 %E A107044 Edited by _Michael Kleber_, Apr 06 2009 %E A107044 Corrected by _Philippe Deléham_, Nov 07 2011