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A087259 a(n) = lcm(n, A025586(n)), least common multiple of n and largest value in 3x+1 iteration list started at n. 1
1, 2, 48, 4, 80, 48, 364, 8, 468, 80, 572, 48, 520, 364, 480, 16, 884, 468, 1672, 20, 1344, 572, 3680, 24, 2200, 520, 249264, 364, 2552, 480, 286192, 32, 3300, 884, 1120, 468, 4144, 1672, 11856, 40, 378512, 1344, 8428, 572, 6120, 3680, 433904, 48, 7252, 2200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

Index entries for sequences related to 3x+1 (or Collatz) problem

MATHEMATICA

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[LCM[w, Max[fpl[w]]], {w, 1, 256}]

CROSSREFS

Cf. A025586, A033496, A087261.

Sequence in context: A079307 A005814 A177190 * A195876 A326778 A083251

Adjacent sequences:  A087256 A087257 A087258 * A087260 A087261 A087262

KEYWORD

nonn

AUTHOR

Labos Elemer, Sep 09 2003

STATUS

approved

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Last modified May 13 14:41 EDT 2021. Contains 343860 sequences. (Running on oeis4.)