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 A061123 #4 May 10 2013 12:44:45 %S A061123 0,0,0,0,0,0,0,0,40320,403200,2217600,26611200,259459200,1695133440, %T A061123 16345929600,161902540800,1208560953600,50830132953600, %U A061123 866513503215360,8470676211379200,166891791625977600,2699606616475507200 %N A061123 Number of degree-n permutations of order exactly 9. %F A061123 E.g.f.: -exp(x+1/3*x^3)+exp(x+1/3*x^3+1/9*x^9). %Y A061123 Cf. A000085, A001470, A001472, A052501, A053496-A053505, A001189, A001471, A001473, A061121-A061128. %K A061123 easy,nonn %O A061123 1,9 %A A061123 _Vladeta Jovovic_, Apr 14 2001