%I #8 Aug 09 2015 00:00:46
%S 2,4,10,34,178,1720,590440
%N Number of equivalence classes of threshold functions under permutations of the variables.
%D D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.1.1, p. 79.
%D S. Muroga, Threshold Logic and Its Applications. Wiley, NY, 1971. [Background]
%Y Cf. A002078, A000617, A001529.
%K nonn,hard,more
%O 0,1
%A _Don Knuth_, Aug 17 2005