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A006688 Number of self-dual equivalence classes switching functions of exactly n+1 variables.
(Formerly M1305)
0
1, 0, 2, 4, 76, 109875 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 20 11:52 EDT 2022. Contains 353871 sequences. (Running on oeis4.)