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Search: id:A137607
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| A137607 |
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a(0)=361, a(n+1)=a(n)/2 if a(n) is even, else a(n+1)=a(0)-(a(n)+1)/2. |
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+0
3
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| 361, 180, 90, 45, 338, 169, 276, 138, 69, 326, 163, 279, 221, 250, 125, 298, 149, 286, 143, 289, 216, 108, 54, 27, 347, 187, 267, 227, 247, 237, 242, 121, 300, 150, 75, 323, 199, 261, 230, 115, 303, 209, 256, 128, 64, 32, 16, 8, 4, 2, 1, 360, 180, 90, 45, 338, 169, 276, 138, 69, 326, 163, 279, 221, 250, 125, 298, 149, 286, 143, 289, 216, 108, 54, 27, 347, 187, 267, 227, 247, 237, 242, 121, 300, 150, 75, 323, 199, 261, 230, 115, 303, 209, 256, 128, 64, 32, 16, 8, 4, 2, 1, 360
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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For n>=1, periodic with period 51. - Vladeta Jovovic (vladeta(AT)eunet.yu), Apr 28 2008
The rule is the following: b(0)=361. If b(n-1) is divisible by 2 then b(n) = b(n-1)/2. If b(n-1) is not divisible by two then b(n) = b(0)-(b(n-1)+1)/2. It is periodic.
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PROGRAM
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(PARI) A137607(n) = if( !n, 361, for( i=0, n%51, n=if( i, if( n%2, 360-n\2, n\2), 360)); n) \\ - M. F. Hasler, Apr 28 2008
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CROSSREFS
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Cf. A096259.
Sequence in context: A156032 A003799 A003930 this_sequence A112078 A145121 A062788
Adjacent sequences: A137604 A137605 A137606 this_sequence A137608 A137609 A137610
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KEYWORD
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nonn,less
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AUTHOR
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Yasutoshi Kohmoto zbi74583(AT)boat.zero.ad.jp, Apr 23 2008
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EXTENSIONS
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Clarified & extended by Vladeta Jovovic (vladeta(AT)eunet.yu) and M. F. Hasler (Maximilian.Hasler(AT)gmail.com), Apr 28 2008
The initial term, 361, seems anomalous. This sequence violates the rule that entries in the OEIS should not depend on an arbitrary but large parameter. - N. J. A. Sloane (njas(AT)research.att.com), May 17 2008
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