A348160 Odd numbers not appearing in A348158.

189, 273, 315, 513, 567, 585, 825, 945, 1071, 1323, 1365, 1539, 1575, 1701, 1755, 1911, 2079, 2205, 2255, 2457, 2565, 2835, 3003, 3069, 3075, 3213, 3465, 3549, 3591, 3969, 4125, 4329, 4347, 4617, 4641, 4725, 4995, 5103, 5187, 5265, 5425, 5481, 5733, 5775, 5859, 5985

Offset

1,1

Comments

a(19) = 2255 is the least term that is not divisible by 3.

Links

Table of n, a(n) for n=1..46.

Mathematica

f[n_] := Plus @@ DeleteDuplicates @ Map[EulerPhi, Divisors[n]]; m = 6000; Complement[Range[1, m, 2], Array[f, m^2]]

Crossrefs

Cf. A348158.

Similar sequences: A005114, A005277.

Sequence in context: A068557 A253024 A031901 * A320709 A224674 A076759

Adjacent sequences: A348157 A348158 A348159 * A348161 A348162 A348163

Keyword

nonn

Author

Amiram Eldar, Oct 03 2021

Status

approved