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A-M baby

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Ingy döt Net 2013-04-10 21:29:02 -07:00
parent 764da6cbbb
commit db842d013d
19005 changed files with 197040 additions and 7 deletions
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1
Task/Hailstone-sequence/Mathematica/hailstone-sequence-1.mathematica Normal file
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HailstoneFP[n_] := Drop[FixedPointList[If[# != 1, Which[Mod[#, 2] == 0, #/2, True, ( 3*# + 1) ], 1] &, n], -1]

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Task/Hailstone-sequence/Mathematica/hailstone-sequence-2.mathematica Normal file
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HailstoneR[1] := {1}
HailstoneR[n_Integer] := Prepend[HailstoneR[3 n + 1], n] /; OddQ[n] && n > 0
HailstoneR[n_Integer] := Prepend[HailstoneR[n/2], n] /; EvenQ[n] && n > 0

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Task/Hailstone-sequence/Mathematica/hailstone-sequence-3.mathematica Normal file
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Hailstone[n_] :=
NestWhileList[Which[Mod[#, 2] == 0, #/2, True, ( 3*# + 1) ] &, n, # != 1 &];
c27 = Hailstone@27;
Print["Hailstone sequence for n = 27: [", c27[[;; 4]], "...", c27[[-4 ;;]], "]"]
Print["Length Hailstone[27] = ", Length@c27]
longest = -1; comp = 0;
Do[temp = Length@Hailstone@i;
If[comp < temp, comp = temp; longest = i],
{i, 100000}
]
Print["Longest Hailstone sequence at n = ", longest, "\nwith length = ", comp];