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A075486
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Length of iteration list when Collatz-function is iterated with initial value -1+2^n.
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0
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8, 6, 20, 13, 27, 28, 122, 123, 36, 37, 157, 114, 53, 54, 99, 100, 101, 102, 103, 73, 167, 168, 169, 170, 171, 172, 248, 174, 188, 189, 252, 253, 179, 180, 318, 244, 196, 197, 154, 155, 156, 157, 401, 327, 496, 497, 162, 163, 332, 333, 409, 472, 411, 412, 338
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n=4,1+2^n=17,list={17,52,26,13,40,20,10,5,16,8,4,2,1}, so a(4)=13.
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FORMULA
| a(n)=A008908(2^n+1)
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CROSSREFS
| Cf. A006370, A008908, A074472, A075487-A075488.
Sequence in context: A119876 A036176 A064685 * A123875 A058088 A112145
Adjacent sequences: A075483 A075484 A075485 * A075487 A075488 A075489
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Sep 26 2002
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