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Search: id:A121883
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| A121883 |
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a(n) = (2*a(n - 1)a(n - 3) + a(n - 2)^2)/a(n - 4) |
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+0
1
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| 1, 1, 1, 1, 3, 7, 23, 187, 1049, 11889, 241169, 3461609, 133910987, 6440667383, 259246821927, 32041224742643, 3584042412456241, 447926142061771361, 160270294066699831201, 42116645114696072883921
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OFFSET
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1,5
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REFERENCES
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A. N. W. Hone, Algebraic curves, integer sequences and a discrete Painleve transcendent, Proceedings of SIDE 6, Helsinki, Finland, 2004.
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MATHEMATICA
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a[n_] := a[n] = (2*a[n - 1]a[n - 3] + a[n - 2]^2)/a[n - 4]; a[0] = 1; a[1] = 1; a[2] = 1; a[3] = 1; Table[a[n], {n, 0, 30}]
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CROSSREFS
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Cf. A006720, A014125, A095708.
Sequence in context: A120271 A048721 A113824 this_sequence A060235 A090188 A001773
Adjacent sequences: A121880 A121881 A121882 this_sequence A121884 A121885 A121886
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KEYWORD
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nonn
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 09 2006
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EXTENSIONS
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Edited by njas, Sep 15 2006
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