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A023634
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s(3n)-s(3n-1), where s( ) is sequence A023633.
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0
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4, 2, 2, 5, 5, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 5, 5, 5, 2, 2, 2, 5, 5, 5, 5, 2, 2, 2, 5, 5, 5, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 5, 5, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 5, 5, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 5, 5, 5, 2, 2, 2, 5, 5, 5, 5
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OFFSET
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1,1
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COMMENTS
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Let (c(n): n>=0) = 0,3,4,5,9,13,17,... be the complement of A023633, and let (b(n)) be the sequence of first differences of (c(n)). Then one sees directly from the definition of A023633 that a(n) = b(n) + 1 for all n.
Conjecture: (a(n)) is fixed point of the morphism
2->5, 4->422, 5->5222,
and so (b(n)) is fixed point of the morphism 1->4, 3->311, 4->4111. (End)
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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