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A081832
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a(1)=a(2)=1, a(n)=a(n+1-2*a(n-1))+a(n-2*a(n-2)).
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0
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1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 20, 21, 21, 21, 22, 22, 22
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Unlike the Hofstadter Q-sequence, this one seems to be an increasing sequence.
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FORMULA
| Conjecture : a(n)/n -> C=1/4; a(n+1)-a(n)=1 or 0, first values of differences are : 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, ....
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CROSSREFS
| Cf. A005185.
Sequence in context: A046155 A026819 A137214 * A034887 A082964 A099741
Adjacent sequences: A081829 A081830 A081831 * A081833 A081834 A081835
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KEYWORD
| nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 10 2003
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