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 A152917 #17 Feb 26 2020 15:27:23
%S A152917 0,1,2,9,64,625,7776,117649,2097152,43046721,1000000000,25937424601,
%T A152917 743008370688,23298085122481,793714773254144,29192926025390625,
%U A152917 1152921504606846976,48661191875666868481,2185911559738696531968,104127350297911241532841
%N A152917 A000169 prefixed by an initial 0.
%C A152917 A variant of A000169, which is the main entry for this sequence. - _N. J. A. Sloane_, Dec 19 2008
%F A152917 a(n) = 0 if n = 0, otherwise a(n) = n^(n-1).
%F A152917 E.g.f.: A(x)=x*G(0) ; G(k)= 1 + x*(2*k+2)^(2*k)/((2*k+1)^(2*k) - x*(2*k+1)^(2*k)*(2*k+3)^(2*k+1)/(x*(2*k+3)^(2*k+1) + (2*k+2)^(2*k+1)/G(k+1))); (continued fraction). - _Sergei N. Gladkovskii_, Dec 30 2011
%F A152917 E.g.f.: -LambertW(-x). - _Alois P. Heinz_, Feb 26 2020
%e A152917 a(10) = 10^9 = 1000000000.
%t A152917 Join[{0},Table[n^(n-1),{n,20}]] (* _Harvey P. Dale_, Jan 28 2017 *)
%Y A152917 Cf. A000169.
%K A152917 nonn
%O A152917 0,3
%A A152917 ShaoJun Ying (dolphinysj(AT)gmail.com), Dec 15 2008