A006688 Number of self-dual equivalence classes switching functions of exactly n+1 variables. (Formerly M1305)

1, 0, 2, 4, 76, 109875

Offset

0,3

References

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

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

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

Links

Table of n, a(n) for n=0..5.

S. Muroga, Threshold Logic and Its Applications, Wiley, NY, 1971 [Annotated scans of a few pages]

Index entries for sequences related to Boolean functions

Crossrefs

Cf. A001531.

Sequence in context: A018378 A023175 A276740 * A292711 A018389 A334336

Adjacent sequences: A006685 A006686 A006687 * A006689 A006690 A006691

Keyword

nonn,nice

Author

N. J. A. Sloane

Status

approved