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 A000157 Number of Boolean functions of n variables. (Formerly M1818 N0721) 2
 1, 2, 7, 111, 308063, 100126976263592, 131867858014413288241233435594064, 2804519150441879896741320496043335469582478995067528608051651559815168 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES M. A. Harrison, Introduction to Switching and Automata Theory. McGraw Hill, NY, 1965, p. 153 (divided by 2). M. A. Harrison, The number of equivalence classes of Boolean functions under groups containing negation, IEEE Trans. Electron. Comput. 12 (1963), 559-561. 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). LINKS Sean A. Irvine, Table of n, a(n) for n = 1..15 FORMULA a(n) = A000370(n)/2. - Sean A. Irvine, Feb 14 2012 CROSSREFS Cf. A000370. Sequence in context: A072664 A045310 A224445 * A264999 A034902 A101429 Adjacent sequences:  A000154 A000155 A000156 * A000158 A000159 A000160 KEYWORD nonn AUTHOR EXTENSIONS More terms from Sean A. Irvine, Feb 13 2012 STATUS approved

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