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 A061250 #11 Feb 07 2023 21:25:27
%S A061250 0,0,8,162,3072,62500,1399680,34588806,939524096,27894275208,
%T A061250 900000000000,31384283767210,1176925259169792,47248516628391468,
%U A061250 2022385242251558912,91957716979980468750,4427218577690292387840,225009351233083599856144,12040000871040740498079744
%N A061250 a(n) = (n-2)*(n-1)^n.
%H A061250 Milan Janjic, <a href="http://www.pmfbl.org/janjic/">Enumerative Formulas for Some Functions on Finite Sets</a>
%t A061250 Table[(n-2)*(n-1)^n,{n,20}] (* _Vladimir Joseph Stephan Orlovsky_, Jan 29 2012 *)
%Y A061250 Cf. A143857. [From _Reinhard Zumkeller_, Jul 23 2010]
%K A061250 nonn,easy
%O A061250 1,3
%A A061250 Gero Burghardt (gerogoestohollywood(AT)yahoo.de), Jun 01 2001
%E A061250 More terms from _Klaus Brockhaus_ and Larry Reeves (larryr(AT)acm.org), Jun 03 2001