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A058259
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Number of split semiorders on n points.
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2
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OFFSET
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1,2
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REFERENCES
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P. C. Fishburn and J. A. Reeds, Counting split semiorders, Order, 18(2): 119-128, 2001.
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LINKS
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Table of n, a(n) for n=1..10.
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CROSSREFS
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Cf. A000111, A058260.
Sequence in context: A163747 A000111 A007976 * A033543 A124531 A129578
Adjacent sequences: A058256 A058257 A058258 * A058260 A058261 A058262
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KEYWORD
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nonn,hard,nice
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AUTHOR
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N. J. A. Sloane, Dec 06 2000
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STATUS
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approved
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