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 A285051 #13 Aug 07 2017 21:28:45 %S A285051 1,11,268,13705,1122726 %N A285051 Idempotent equivalence class multiplications for the full transformation semigroup. %C A285051 Over all n^n transformations create a list of 3-tuples (a,b,c) where a*b = c. For each tuple map each of the three elements to its idempotent under self-composition, (g^i)*(g^i) = g^i. Collect the unique 3-tuples. %e A285051 For n=2: [([0,0],[0,0],[0,0]),([0,0],[0,1],[0,0]),([0,0],[1,1],[0,0]),([0,1],[0,0],[0,0]),([0,1],[0,1],[0,1]),([0,1],[1,1],[1,1]),([0,1],[0,0],[1,1]),([0,1],[1,1],[0,0]),([1,1],[0,0],[1,1]),([1,1],[0,1],[1,1]),([1,1],[1,1],[1,1])] %K A285051 nonn,more %O A285051 1,2 %A A285051 _Chad Brewbaker_, Apr 08 2017