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Search: id:A065597
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| A065597 |
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a(0)=0, a(1)=1, a(2)=1; for n>=3, a(n) = 2*a(n-1)*a(n-2)-a(n-3). |
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2
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| 0, 1, 1, 2, 3, 11, 64, 1405, 179829, 505319426, 181742174114903, 183675702207469683831527, 66763242902534057178758511601478574336, 24525571043541618855545577854946122156632189794267317765667241
(list; graph; listen)
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OFFSET
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0,4
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REFERENCES
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F. Axel et al., Vibrational modes in a one dimensional "quasi-alloy": the Morse case, J. de Physique, Colloq. C3, Supp. to No. 7, Vol. 47 (Jul 1986), pp. C3-181-C3-186; see Eq. (10).
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MAPLE
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A065597 := proc(n) option remember; if n <= 1 then n else 2*A065597(n-1)*A065597(n-2)-A065597(n-3); fi; end;
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CROSSREFS
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Cf. A065598.
Sequence in context: A110482 A105217 A066046 this_sequence A001052 A109132 A008510
Adjacent sequences: A065594 A065595 A065596 this_sequence A065598 A065599 A065600
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KEYWORD
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nonn,easy
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AUTHOR
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njas, Dec 01 2001
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