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Search: id:A087226
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| A087226 |
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LCM of terms arising in fixed-point-list of Collatz function initiated at n. |
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+0
3
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| 1, 2, 240, 4, 80, 240, 1361360, 8, 12252240, 80, 194480, 240, 1040, 1361360, 4095840, 16, 17680, 12252240, 107158480, 80, 1344, 194480, 1365280, 240, 535792400, 1040, 44841486948146266934850832405421294927083491752830032389039800908293040266400
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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n=9: list={9,28,14,7,22,11,34,17,52,26,13,40,20,10,5,16,8,4,2,1};
LCM=2.2.2.2.3.3.5.7.11.13.17=12252240.
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MATHEMATICA
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c[x_] := (1-Mod[x, 2])*(x/2)+Mod[x, 2]*(3*x+1); c[1]=1; fpl[x_] := Delete[FixedPointList[c, x], -1] Table[Apply[LCM, fpl[w]], {w, 1, 32}]
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CROSSREFS
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Cf. A006370.
Adjacent sequences: A087223 A087224 A087225 this_sequence A087227 A087228 A087229
Sequence in context: A139963 A124046 A101146 this_sequence A071967 A024348 A006523
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Aug 28 2003
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