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A333785
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Numbers m such that the average path sum is an integer when iterating from m to 1 with nondeterministic map k -> k - k/p, where p is any prime factor of k.
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4
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1, 2, 3, 4, 5, 8, 14, 16, 17, 20, 25, 32, 50, 64, 68, 82, 83, 84, 100, 101, 125, 128, 162, 163, 170, 235, 243, 256, 257, 272, 289, 456, 457, 512, 548, 621, 1024, 1028, 1040, 2048, 4096, 4112, 7225, 8192, 8738, 9248, 13058, 16384, 16480, 16481, 17476, 17477, 32128, 32768, 65536, 65537, 131072, 132098, 262144, 262148, 264196
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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Position[Map[Mean[Total /@ #] &, #], _?IntegerQ][[All, 1]] &@ Nest[Function[{a, n}, Append[a, Join @@ Table[Flatten@ Prepend[#, n] & /@ a[[n - n/p]], {p, FactorInteger[n][[All, 1]]}]]] @@ {#, Length@ # + 1} &, {{{1}}}, 2^10 + 1] (* Michael De Vlieger, Apr 15 2020 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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