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A058976
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Number of inequivalent n-variable 3-valued Post functions under action of complementing group D(n,3).
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0
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18, 5346, 953350947018, 27714155515204399193517936441633366786, 2724676327686279943840970955808149115560850239284680391197227771656355326713750473204820187166236658820072758036618
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Next term has 347 digits.
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REFERENCES
| M. A. Harrison, Introduction to Switching and Automata Theory. McGraw Hill, NY, 1965, p. 144.
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FORMULA
| a(n)=2^(-n)*Sum_{k=0..n} binomial(n, k)*3^((3^(n-k)+3^n)/2).
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CROSSREFS
| Cf. A000231.
Sequence in context: A008994 A036214 A188799 * A013723 A159405 A060617
Adjacent sequences: A058973 A058974 A058975 * A058977 A058978 A058979
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KEYWORD
| easy,nonn
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AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 14 2001
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