A171421 Euler totient function of the n-th single or isolated number.

1, 2, 2, 4, 6, 22, 8, 36, 12, 46, 52, 16, 66, 24, 78, 82, 88, 96, 32, 36, 112, 126, 130, 44, 40, 156, 162, 166, 172, 48, 64, 60, 210, 222, 72, 232, 64, 250, 256, 262, 72, 276, 92, 292, 306, 96, 316, 330, 336, 112, 352, 358, 366, 372, 378, 382, 388, 396, 400, 408

Offset

1,2

Links

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

Formula

a(n) = A000010(A167706(n)).

Crossrefs

Cf. A000010, A167706, A168543.

Sequence in context: A357951 A227315 A080611 * A072707 A086105 A084701

Adjacent sequences: A171418 A171419 A171420 * A171422 A171423 A171424

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Dec 08 2009

Extensions

More terms from Amiram Eldar, Feb 29 2020

Status

approved