A095387 Initial values for 3x+1 trajectories of which the largest term is 9232.

27, 31, 41, 47, 54, 55, 62, 63, 71, 73, 82, 83, 91, 94, 95, 97, 103, 107, 108, 109, 110, 111, 121, 124, 125, 126, 129, 137, 142, 143, 145, 146, 147, 155, 159, 161, 164, 165, 166, 167, 171, 175, 182, 183, 188, 189, 190, 193, 194, 195, 199, 206, 207, 214, 215

Offset

1,1

Comments

Altogether 1579 such initial values exist: 27, ..., 9232.

Links

Jinyuan Wang, Table of n, a(n) for n = 1..1579

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

Formula

1579 solutions to A025586(x) = 9232.

Mathematica

c[x_]:=c[x]=(1-Mod[x, 2])*(x/2)+Mod[x, 2]*(3*x+1); c[1]=1; fpl[x_]:=Delete[FixedPointList[c, x], -1] {ta=Table[0, {1580}], u=1}; Do[If[Equal[Max[fpl[n]], 9232], ta[[u]]=n; u=u+1], {n, 1, 9232}]; ta

Crossrefs

Cf. A025586.

Sequence in context: A039562 A160394 A316729 * A228060 A031408 A324248

Adjacent sequences: A095384 A095385 A095386 * A095388 A095389 A095390

Keyword

nonn,fini,full

Author

Labos Elemer, Jun 14 2004

Status

approved