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Search: id:A058976
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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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1
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| 18, 5346, 953350947018, 27714155515204399193517936441633366786, 27246763276862799438409709558081491155608502392846803911972277716563553267137504\ 73204820187166236658820072758036618
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Next term has 347 digits.
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REFERENCES
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M. A. Harrison, Introduction to Switching and Automata Theory. McGraw Hill, NY, 1965, p. 144.
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FORMULA
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a(n)=2^(-n)*Sum_{k=0..n} binomial(n, k)*3^((3^(n-k)+3^n)/2).
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CROSSREFS
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Cf. A000231.
Sequence in context: A001325 A008994 A036214 this_sequence A013723 A159405 A060617
Adjacent sequences: A058973 A058974 A058975 this_sequence A058977 A058978 A058979
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KEYWORD
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easy,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 14 2001
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