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Search: id:A086525
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| A086525 |
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a(n) = a(( a(n-2))*(1-mod(n,2))+a(n-1)*(mod(n,2))) + a((n - a(n-2))*(1-mod(n,2))+(n-a(n-1))*(mod(n,2))). |
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+0
2
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| 1, 1, 2, 3, 3, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28, 29, 30, 30, 31, 32, 32, 33, 34, 34, 35, 36, 37, 37, 38, 39, 40, 40, 41, 42, 42, 43, 44, 44, 45, 46, 47, 47, 48, 49, 50, 50, 51, 52, 52
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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The sequence o2 mentioned in A086841.
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LINKS
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Index entries for Hofstadter-type sequences
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MATHEMATICA
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digits=200 Mc[n_Integer?Positive] :Mc[n] =Mc[( Mc[n-2])*(1-Mod[n, 2])+Mc[n-1]*(Mod[n, 2])] + Mc[(n - Mc[n-2])*(1-Mod[n, 2])+(n-Mc[n-1])*(Mod[n, 2])] Mc[1] = Mc[2] = 1 a1=Table[Mc[n], {n, 1, digits}]
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CROSSREFS
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Cf. A004001, A005185, A086335, A086841, A005229.
Sequence in context: A091245 A100618 A061288 this_sequence A120503 A083544 A057353
Adjacent sequences: A086522 A086523 A086524 this_sequence A086526 A086527 A086528
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KEYWORD
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nonn
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Sep 14 2003
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Nov 07 2007
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