%I #8 Apr 09 2014 10:15:00
%S 1,1,2,6,18,54,216,864,3456,13824,55296,221184,884736,3538944,
%T 14155776,56623104,226492416,905969664,4529848320,22649241600,
%U 113246208000,566231040000,2831155200000,14155776000000,70778880000000
%N a(1) = 1; a(n+1) = a(n) * k(n), where k(n) is the number of elements of {a(j)}, 1<=j<=n, which are <= n.
%Y Cf. A094589.
%K nonn,easy
%O 1,3
%A _Leroy Quet_, Jun 07 2004
%E More terms from _Vladeta Jovovic_, Jun 13 2004