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A075488
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Length of iteration list when Collatz-function is iterated with initial value -1+3^n.
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6
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2, 4, 11, 10, 97, 96, 33, 32, 44, 43, 135, 134, 133, 132, 100, 99, 191, 190, 140, 139, 262, 261, 428, 427, 395, 394, 331, 330, 391, 390, 389, 388, 462, 461, 460, 459, 458, 457, 456, 455, 454, 453, 501, 500, 499, 498, 497, 496, 495, 494, 493, 492, 747, 746
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n=3,-1+3^n=26,list={26,13,40,20,10,5,16,8,4,2,1},a(3)=11.
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FORMULA
| a(n)=A008908(3^n-1)
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CROSSREFS
| Cf. A006370, A008908, A074472, A075484-A075487.
Sequence in context: A012616 A012611 A124183 * A136995 A136993 A136992
Adjacent sequences: A075485 A075486 A075487 * A075489 A075490 A075491
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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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