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A052265
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Triangle giving a(n,r) = number of equivalence classes of Boolean functions of n variables and range r=0..2^n under action of symmetric group.
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5
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1, 1, 1, 2, 1, 1, 3, 4, 3, 1, 1, 4, 9, 16, 20, 16, 9, 4, 1, 1, 5, 17, 52, 136, 284, 477, 655, 730, 655, 477, 284, 136, 52, 17, 5, 1, 1, 6, 28, 134, 625, 2674, 10195, 34230, 100577, 258092, 579208, 1140090, 1974438, 3016994, 4077077, 4881092, 5182326, 4881092
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OFFSET
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0,4
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REFERENCES
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M. A. Harrison, Introduction to Switching and Automata Theory. McGraw Hill, NY, 1965, p. 147.
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LINKS
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Table of n, a(n) for n=0..53.
Index entries for sequences related to Boolean functions
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EXAMPLE
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[1, 1], [1, 2, 1], [1, 3, 4, 3, 1], [1, 4, 9, 16, 20, 16, 9, 4, 1], ...
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CROSSREFS
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Row sums give A003180.
Sequence in context: A159933 A128314 A025564 * A055068 A015138 A157807
Adjacent sequences: A052262 A052263 A052264 * A052266 A052267 A052268
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KEYWORD
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nonn,tabf,nice,changed
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AUTHOR
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Vladeta Jovovic, Feb 04 2000
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STATUS
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approved
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