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 A019578 #6 Mar 28 2019 11:24:38 %S A019578 1,12,160,2450,43050,858480,19208000,477237600,13049190000, %T A019578 389642022000,12620614406400,440871877446000,16525943429595600, %U A019578 661779275661504000,28199857953915648000,1274233240573028736000,60863881753459328544000 %N A019578 Place n distinguishable balls in n boxes (in n^n ways); let f(n,k) = number of ways that max in any box is k, for 1<=k<=n; sequence gives f(n,3)/n. %Y A019578 Cf. A019576. %K A019578 nonn %O A019578 3,2 %A A019578 Lee Corbin (lcorbin(AT)tsoft.com) %E A019578 More terms from _Sean A. Irvine_, Mar 27 2019