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 A218161 Recurring digital invariants of order 3. 3
 55, 136, 160, 919 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Eric Weisstein's World of Mathematics, Recurring Digital Invariant EXAMPLE 136: 1^3 + 3^3 + 6^3 = 244 244: 2^3 + 4^3 + 4^3 = 136, so 136 is an order 3 recurring digital invariant. MATHEMATICA lst = {}; f[n_] := Total[IntegerDigits[n]^3]; Do[a = n; Do[a = f[a]; If[a < n, Break[]]; If[a == n && ! n == f[n], AppendTo[lst, n]; Break[]], {3}], {n, 10^3}]; lst CROSSREFS Cf. A218246-A218248. Sequence in context: A063324 A046156 A224459 * A044306 A044687 A250578 Adjacent sequences:  A218158 A218159 A218160 * A218162 A218163 A218164 KEYWORD base,fini,full,nonn AUTHOR Arkadiusz Wesolowski, Oct 22 2012 STATUS approved

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Last modified June 25 05:58 EDT 2021. Contains 345452 sequences. (Running on oeis4.)