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A134202
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Number of rigid Hv-groups of order n.
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2
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1, 5, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14
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OFFSET
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1,2
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REFERENCES
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R. Bayon and N. Lygeros, Hyperstructures and Automorphism Groups, submitted.
Th. Vougiouklis, The fundamental relation in hyperrings: The general hyperfield, Fourth Int. Congress Algebraic Hyperstructures and Appl. (AHA), 1991, pp. 203-211.
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LINKS
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FORMULA
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a(1)=1, a(2)=5, a(3)=13, a(n)=14 for n>3.
G.f.: -x*(1+4*x+8*x^2+x^3)/(-1+x). - R. J. Mathar, Nov 14 2007
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Roman Bayon (roman.bayon(AT)gmail.com), Oct 14 2007
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STATUS
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approved
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