A006688 - OEIS

%I M1305 #16 Dec 18 2021 20:54:21

%S 1,0,2,4,76,109875

%N Number of self-dual equivalence classes switching functions of exactly n+1 variables.

%D S. Muroga, Threshold Logic and Its Applications. Wiley, NY, 1971, p. 38, Table 2.3.2. - Row 22.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%D I. Toda, On the number of types of self-dual logical functions, IEEE Trans. Electron. Comput., 11 (1962), 282-284.

%H S. Muroga, <a href="/A000371/a000371.pdf">Threshold Logic and Its Applications</a>, Wiley, NY, 1971 [Annotated scans of a few pages]

%H <a href="/index/Bo#Boolean">Index entries for sequences related to Boolean functions</a>

%Y Cf. A001531.

%K nonn,nice

%O 0,3

%A _N. J. A. Sloane_