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A056758 Numbers n for which d(n)^3 < n. 1

%I #10 Jun 25 2021 18:14:27

%S 11,13,17,19,23,29,31,37,41,43,47,49,53,59,61,65,67,69,71,73,74,77,79,

%T 82,83,85,86,87,89,91,93,94,95,97,101,103,106,107,109,111,113,115,118,

%U 119,121,122,123,125,127,129,131,133,134,137,139,141,142,143,145,146

%N Numbers n for which d(n)^3 < n.

%C The complementary set (d^3 > n) is finite, albeit with very large terms. See also d(n)^2 < n, A035035.

%C The last number not in this sequence is 27935107200. - _Charles R Greathouse IV_, Feb 27 2017

%F d(n)^3 = A000005(n)^3 < n.

%e n=254, d(n)=4, d^3 = 64 < 254 so 254 is in the sequence.

%o (PARI) is(n)=numdiv(n)^3 < n \\ _Charles R Greathouse IV_, Feb 25 2017

%Y Cf. A035033-A035035, A034884.

%K nonn,easy

%O 1,1

%A _Labos Elemer_, Aug 16 2000

%E Erroneous linear recurrence signature link deleted by _Harvey P. Dale_, Jun 25 2021

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Last modified April 24 06:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)