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%I #4 Mar 30 2012 18:36:23
%S 1,3,9,37,188,1129,7904,63234,569109,5691091,62602003,751224046,
%T 9765912599,136722776399,2050841645987,32813466335800,557828927708615,
%U 10040920698755070,190777493276346341,3815549865526926829
%N [ exp(9/20)*n! ].
%K nonn
%O 1,2
%A _Simon Plouffe_