A292572 Lucas-Carmichael numbers whose Dedekind psi value is a cube.

8855, 31535, 73535, 265895, 12676799, 30071327, 86450399, 561645839, 674628479, 741722399, 945066527, 1066699799, 1304305415, 2239506719, 2423951999, 2693338559, 3512071871, 4708417055, 4811496767, 8194093919, 9140299199, 9184665599, 9405512639, 11729537855

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..89 (terms below 10^12)

Example

psi(8855) = 24^3.

Mathematica

psi[n_] := If[n < 1, 0, n*Sum[MoebiusMu[d]^2/d, {d, Divisors@n}]]; s = Import["b006972.txt", "Data"][[All, -1]]; Select[s, IntegerQ@Power[psi@#, 1/3] &]

Crossrefs

Cf. A001615, A006972, A290793, A292571, A292573.

Sequence in context: A031797 A202159 A216926 * A236031 A071564 A031625

Adjacent sequences: A292569 A292570 A292571 * A292573 A292574 A292575

Keyword

nonn

Author

Amiram Eldar, Sep 19 2017

Status

approved