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A057544
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Maximum cycle length (orbit size) in the rotation permutation of n+2 side polygon triangularizations.
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8
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1, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68
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OFFSET
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0,3
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COMMENTS
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LINKS
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FORMULA
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a(0)=1, a(1)=1, a(2)=2, a(n)=n+2.
a(n) = 2*a(n-1) - a(n-2) for n > 4.
G.f.: (-2*x^4 + 2*x^3 + x^2 - x + 1)/(x - 1)^2. (End)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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