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 A055860 #14 Jan 08 2018 21:02:27 %S A055860 0,2,9,64,625,7776,117649,2097152,43046721,1000000000,25937424601, %T A055860 743008370688,23298085122481,793714773254144,29192926025390625, %U A055860 1152921504606846976,48661191875666868481,2185911559738696531968 %N A055860 a(n) = A000169(n+1) if n > 0; a(0) = 0. %H A055860 INRIA Algorithms Project, <a href="http://ecs.inria.fr/services/structure?nbr=67">Encyclopedia of Combinatorial Structures 67</a> %F A055860 a(0) = 0; for n >= 1, a(n) = (n+1)^n. %F A055860 E.g.f.: -W(-x)/((1+W(-x))*x) - 1 = -(d/dx)W(x) - 1, W(x) principal branch of Lambert's function. %Y A055860 Second column of triangle A055858. Cf. A000169, A055858, A000312. %K A055860 nonn,easy %O A055860 0,2 %A A055860 _Wolfdieter Lang_, Jun 20 2000