A048188 a(n) = phi(n-th untouchable number).

1, 4, 24, 40, 32, 32, 60, 72, 54, 92, 102, 48, 72, 96, 80, 120, 130, 132, 88, 96, 112, 144, 144, 96, 132, 108, 162, 96, 108, 120, 168, 128, 140, 168, 192, 232, 156, 164, 168, 216, 192, 208, 144, 176, 276, 280, 192, 288, 192, 192, 312, 312, 276, 332, 264, 232, 192

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = A000010(A005114(n)).

Crossrefs

Cf. A000010, A005114, A048189, A048190, A048191.

Sequence in context: A189228 A338786 A363218 * A121024 A120622 A031117

Adjacent sequences: A048185 A048186 A048187 * A048189 A048190 A048191

Keyword

nonn

Author

Naohiro Nomoto

Extensions

More terms from Amiram Eldar, Sep 23 2022

Status

approved