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 A127124 #5 Mar 30 2012 17:35:17 %S A127124 1,1,2,1,4,2,1,9,4,3,2,1,20,9,8,4,3,2,1,51,20,18,9,10,8,4,4,3,2,1,125, %T A127124 51,40,20,36,18,9,10,12,8,4,4,3,2,1,329,125,102,51,80,40,20,45,36,27, %U A127124 18,9,20,10,12,8,4,5,4,3,2,1,862,329,250,125,204,102,51,180,80,60,40,20,45 %N A127124 Number of endofunctions whose component sizes form the n-th partition in Mathematica order. %C A127124 Can be regarded as a triangle with one row for each size of partition. %e A127124 For n = 3, the 7 endofunctions are (1,2,3) -> (1,1,1), (1,1,2), (1,2,1), (2,1,1), (1,2,3), (1,3,2) and (2,3,1). The components are respectively 123, 123, 13|2, 123, 1|2|3, 1|23 and 123, corresponding to partitions [3], [3], [2,1], [3], [1^3], [2,1] and [3]. The partitions of 3 in Mathematica order are [3], [2,1] and [1^3], so row 3 is 4,2,1. %e A127124 The triangle starts: %e A127124 1 %e A127124 1 %e A127124 2 1 %e A127124 4 2 1 %e A127124 9 4 3 2 1 %e A127124 20 9 8 4 3 2 1 %K A127124 nonn,tabf %O A127124 0,3 %A A127124 _Franklin T. Adams-Watters_, Jan 05 2007