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A010908
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Pisot sequence E(4,21), a(n)=[ a(n-1)^2/a(n-2)+1/2 ].
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0
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4, 21, 110, 576, 3016, 15792, 82688, 432960, 2267008, 11870208, 62153216, 325438464, 1704017920, 8922353664, 46718050304, 244618887168, 1280841121792, 6706571182080, 35116062605312, 183870090903552
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OFFSET
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0,1
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COMMENTS
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For n>=1, a(n-1) is the number of generalized compositions of n when there are i+3 different types of i, (i=1,2,...). [From Milan Janjic, Sep 24 2010]
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REFERENCES
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D. W. Boyd, Some integer sequences related to the Pisot sequences, Acta Arithmetica, 34 (1979), 295-305.
D. W. Boyd, Linear recurrence relations for some generalized Pisot sequences, Advances in Number Theory ( Kingston ON, 1991) 333-340, Oxford Sci. Publ., Oxford Univ. Press, New York, 1993.
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LINKS
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Table of n, a(n) for n=0..19.
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CROSSREFS
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Sequence in context: A183367 A100237 A117381 * A136786 A026335 A027909
Adjacent sequences: A010905 A010906 A010907 * A010909 A010910 A010911
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KEYWORD
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nonn
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AUTHOR
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Simon Plouffe
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STATUS
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approved
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