%I A032037
%S A032037 1,2,18,264,5400,141840,4551120,172529280,7545363840,373944211200,
%T A032037 20711190931200,1267784551756800,84991791159475200,
%U A032037 6193091146059417600,487361761916020992000,41192820513212239872000
%N A032037 Doubles (index 2+) under "AIJ" (ordered, indistinct, labeled) transform.
%H A032037 INRIA Algorithms Project, <a href="http://algo.inria.fr/bin/encyclopedia?Search=ECSnb&argsearch=92">
               Encyclopedia of Combinatorial Structures 92</a>
%F A032037 a(n) = n!*A001003(n-1). - Vladeta Jovovic (vladeta(AT)eunet.rs), Dec 
               06 2002
%t A032037 a[1]=1; a[2]=2; a[n_] := a[n]=3(2n-3)a[n-1]-(n-1)(n-3)a[n-2]
%Y A032037 Sequence in context: A099880 A141009 A143154 this_sequence A138275 A127134 
               A131455
%Y A032037 Adjacent sequences: A032034 A032035 A032036 this_sequence A032038 A032039 
               A032040
%K A032037 nonn
%O A032037 1,2
%A A032037 Christian G. Bower (bowerc(AT)usa.net)