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Search: id:A001320
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| A001320 |
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Number of self-complementary Boolean functions of n variables.
(Formerly M2982 N1204)
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+0
2
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| 1, 3, 14, 240, 63488, 4227858432, 18302628885633695744, 338953138925153547590470800371487866880, 115565932813024562229384322928592814283244066726840484812818018414147674308608
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
M. A. Harrison, The number of equivalence classes of Boolean functions under groups containing negation, IEEE Trans. Electron. Comput. 12 (1963), 559-561.
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LINKS
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Index entries for sequences related to Boolean functions
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FORMULA
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Sum(((fermat(n)-1))/2^(j+1),j=0..n). - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 24 2006
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MAPLE
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a:=n->sum(((fermat(n)-1))/2^(j+1), j=0..n): seq(a(n), n=0..8); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 24 2006
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CROSSREFS
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Cf. A000610.
Sequence in context: A132490 A058388 A081383 this_sequence A133028 A144985 A081397
Adjacent sequences: A001317 A001318 A001319 this_sequence A001321 A001322 A001323
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KEYWORD
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nonn,easy,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 23 2000
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