%I M1991 N0785 #32 Feb 01 2022 23:44:36

%S 1,1,2,10,208,615904,200253951911058

%N NPN-equivalence classes of switching functions of exactly n variables.

%D S. Muroga, Threshold Logic and Its Applications. Wiley, NY, 1971, p. 38, Table 2.3.2. - Row 17.

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

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

%H Goto, Eiichi, and Hidetosi Takahasi, <a href="/A000371/a000371_1.pdf">Some Theorems Useful in Threshold Logic for Enumerating Boolean Functions</a>, in Proceedings International Federation for Information Processing (IFIP) Congress, 1962, pp. 747-752. [Annotated scans of certain pages]

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

%H S. Muroga, I. Toda and M. Kondo, <a href="https://doi.org/10.1090/S0025-5718-62-99195-0">Majority decision functions of up to six variables</a>, Math. Comp., 16 (1962), 459-472.

%H S. Muroga, I. Toda and M. Kondo, <a href="/A001528/a001528.pdf">Majority decision functions of up to six variables</a>, Math. Comp., 16 (1962), 459-472. [Annotated partially scanned copy]

%H S. Muroga, T. Tsuboi and C. R. Baugh, <a href="/A002077/a002077.pdf">Enumeration of threshold functions of eight variables</a>, IEEE Trans. Computers, 19 (1970), 818-825. [Annotated scanned copy]

%H R. O. Winder, <a href="https://doi.org/10.1109/PGEC.1965.264136">Enumeration of seven-argument threshold functions</a>, IEEE Trans. Electron. Computers, 14 (1965), 315-325.

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

%K nonn,more

%O 0,3

%A _N. J. A. Sloane_