%I #4 May 10 2013 12:44:31
%S 3,18,3645,317831937966,3695220735363494263609015164945808626,
%T 121096725674945775281820931369251071805435386335925283528419283108512015348357219417301307065046229239236569208945
%N Number of equivalence classes of self-dual 3-valued Post functions of n variables under action of symmetric group S_n.
%C Next term has 345 digits.
%Y Cf. A001531, A057132, A057134, A001321.
%K nonn
%O 1,1
%A _Vladeta Jovovic_, Aug 11 2000