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A046156
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Limit set for operation of repeatedly replacing a number with the sum of the cubes of its digits.
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6
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0, 1, 55, 133, 136, 153, 160, 217, 244, 250, 352, 370, 371, 407, 919, 1459
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OFFSET
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1,3
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COMMENTS
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LINKS
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MATHEMATICA
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lst = {}; k = 0; While[k < 1500, a = NestWhile[Plus @@ (IntegerDigits@ #^3) &, k, Unequal, All]; If[FreeQ[lst, a], AppendTo[lst, a]]; k++]; Sort@ lst (* Robert G. Wilson v, Jan 19 2006, revised Jan 03 2015 *)
Table[Nest[Total[IntegerDigits[#]^3]&, n, 30], {n, 0, 1500}]//Union (* Harvey P. Dale, Aug 04 2018 *)
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CROSSREFS
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KEYWORD
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nonn,fini,full,base
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AUTHOR
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Richard C. Schroeppel
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STATUS
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approved
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