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A005736
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Number of degenerate fanout-free Boolean functions of n variables.
(Formerly M1697)
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15
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0, 2, 6, 32, 314, 4892, 104518, 2814520, 91069042, 3434371508, 147755228670, 7137203824016, 382309275191786, 22484502178536140, 1440083130444110134, 99761235465965943400, 7431676025141300550370, 592372327653418546022756
(list;
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history;
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OFFSET
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0,2
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REFERENCES
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J. P. Hayes, Enumeration of fanout-free Boolean functions, J. ACM, 23 (1976), 700-709.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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FORMULA
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a(n) = Sum_{k=0..n-1} binomial(n, k) * s(k) where s(0)=2 and s(n) = A005640(n + 1) otherwise. - Sean A. Irvine, Jul 21 2016
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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