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A095387
Initial values for 3x+1 trajectories of which the largest term is 9232.
2
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.
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
KEYWORD
nonn,fini,full
AUTHOR
Labos Elemer, Jun 14 2004
STATUS
approved