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 A246137 #9 Aug 26 2014 01:32:05 %S A246137 0,1,1,1,6,0,120,30,840,0,362880,0,39916800,0,0,64864800, %T A246137 1307674368000,0,355687428096000,0,0,0,51090942171709440000,0, %U A246137 1292600836944248832000,0,35905578804006912000000,0 %N A246137 Number of maximal classes determined by elementary Abelian p-groups. %C A246137 Corresponds to r_3(k) in the Rosenberg paper. %H A246137 Rosenberg, Ivo; <a href="http://dx.doi.org/10.1016/0097-3165(73)90058-7">The number of maximal closed classes in the set of functions over a finite domain</a>, J. Combinatorial Theory Ser. A 14 (1973), 1-7. %F A246137 a(p^m) = (p^m-1)! / (p^binomial(m, 2) * (p-1) * (p^2-1) * ... * (p^m-1)). In all other cases a(n) = 0. %Y A246137 Cf. A002826. %K A246137 nonn %O A246137 1,5 %A A246137 _Sean A. Irvine_, Aug 25 2014