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A132294
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The first three terms are 1. After that, a(n)=(a(n-1))^2-a(n-2)-a(n-3).
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0
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1, 1, 1, -1, -1, 1, 3, 9, 77, 5917, 35010803, 1225756326698815, 1502478572442172090395687387505, 2257441860647867366107450759398738024116019978304775668415407
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OFFSET
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1,7
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LINKS
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Table of n, a(n) for n=1..14.
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EXAMPLE
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a(9)=9^2-3-1=77.
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MATHEMATICA
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a[n_]:=a[n]=a[n-1]^2-a[n-2]-a[n-3]; a[1]=a[2]=a[3]=1
Transpose[NestList[Flatten[{Rest[#], Last[#]^2-Total[Most[#]]}]&, {1, 1, 1}, 15]][[1]] (* Harvey P. Dale, Apr 28 2012 *)
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CROSSREFS
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Sequence in context: A018576 A027290 A131496 * A032330 A018604 A301535
Adjacent sequences: A132291 A132292 A132293 * A132295 A132296 A132297
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KEYWORD
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sign
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AUTHOR
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Ben Branman, Nov 06 2007, Nov 07 2007
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STATUS
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approved
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