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A242211
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a(1) = 4, a(n) = A222208(a(n-1)).
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0
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OFFSET
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1,1
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COMMENTS
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The definition "a(1) = 2, a(n) = A222208(a(n-1))" produces the periodic sequence 2, 3, 2, 3, 2, 3, 2, ... .
It appears that a(n) = 2^(2^floor((n-1)/2))*3^(2^floor((n-2)/2)) (for n > 1). If it is true, a(10) = 2821109907456.
The definition "b(1) = 8, b(k) = A222208(b(k-1))" produces the sequence: 8, 18, 48, 324, 2304, 104976, ... . It appears that b(k) = 2^A135530(k-1)*3^A135530(k-2) (for k > 1). (End)
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LINKS
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EXAMPLE
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a(3) = 12 because a(2) = 6 and A222208(6) = 12.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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