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A087839
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a[n] =a[a[a[a[a[n-2]]]]]+ a[n - a[n-2]].
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1
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1, 1, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| A fifth order recursion based on Colin Mallows's sequence A005229.
Differs from A106742 at n = 233 where this is 23 whereas A106742(233) = 22. - Joshua Zucker, May 17 2007
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MATHEMATICA
| Mallows[n_Integer?Positive] := Mallows[n] = Mallows[Mallows[Mallows[Mallows[Mallows[n-2]]]]]+ Mallows[n - Mallows[n-2]] Mallows[1] = Mallows[2] = 1 digits=200 a=Table[Mallows[n], {n, 1, digits}]
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CROSSREFS
| Cf. A004001, A005229, A106742.
Sequence in context: A130241 A130247 * A106742 A106733 A087838 A057627
Adjacent sequences: A087836 A087837 A087838 * A087840 A087841 A087842
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KEYWORD
| nonn
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Oct 07 2003
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Jun 15 2007
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