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A076784
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Let u(1)=u(2)=u(3)=1, u(n)=(2^floor(u(n-1)/2)+2^floor(u(n-2)/2)+1)/u(n-3) then a(n) = numerator of u(n).
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1
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1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13
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OFFSET
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1,4
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COMMENTS
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Sequence is 24-periodic
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LINKS
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Table of n, a(n) for n=1..85.
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FORMULA
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Period is (1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3)
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CROSSREFS
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Cf. A076785.
Sequence in context: A124636 A049930 A102938 * A088764 A093124 A055664
Adjacent sequences: A076781 A076782 A076783 * A076785 A076786 A076787
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KEYWORD
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frac,nonn
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AUTHOR
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Benoit Cloitre, Nov 24 2002
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STATUS
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approved
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