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A002825 Number of precomplete Post functions.
(Formerly M1935 N0765)
0
1, 2, 9, 40, 355, 11490, 7758205, 549758283980 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Rosenberg, Ivo; The number of maximal closed classes in the set of functions over a finite domain. J. Combinatorial Theory Ser. A 14 (1973), 1-7.

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

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

Zaharova, E. Ju.; Kudrjavcev, V. B.; Jablonskii, S. V. Precomplete classes in $k$-valued logics. (Russian) Dokl. Akad. Nauk SSSR 186 1969 509-512. English translation in Soviet Math. Doklady 10 (No. 3, 1969), 618-622.

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Sequence in context: A056844 A220471 A213095 * A052322 A130767 A217190

Adjacent sequences:  A002822 A002823 A002824 * A002826 A002827 A002828

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 19 11:23 EDT 2013. Contains 226404 sequences.