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Search: id:A108799
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| A108799 |
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Number of nonisomorphic systems enumerated by A102896; that is, the number of inequivalent closure operators (or Moore families). |
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+0
8
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OFFSET
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0,2
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REFERENCES
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D. E. Knuth, The Art of Computer Programming, Vol. 4, Section 7.1.1 (in preparation).
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CROSSREFS
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Equals (1/2)*A108801(n).
Cf. A102894, A102895, A102896, A102897, A108798, A108800, A108801.
Sequence in context: A002786 A039719 A014466 this_sequence A085871 A080280 A055813
Adjacent sequences: A108796 A108797 A108798 this_sequence A108800 A108801 A108802
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KEYWORD
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nonn,hard
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AUTHOR
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D. E. Knuth, Jul 01, 2005; a(6) received Aug 17, 2005
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