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A319341 a(n) = A000010(n) - A173557(n). 3
0, 0, 0, 1, 0, 0, 0, 3, 4, 0, 0, 2, 0, 0, 0, 7, 0, 4, 0, 4, 0, 0, 0, 6, 16, 0, 16, 6, 0, 0, 0, 15, 0, 0, 0, 10, 0, 0, 0, 12, 0, 0, 0, 10, 16, 0, 0, 14, 36, 16, 0, 12, 0, 16, 0, 18, 0, 0, 0, 8, 0, 0, 24, 31, 0, 0, 0, 16, 0, 0, 0, 22, 0, 0, 32, 18, 0, 0, 0, 28, 52, 0, 0, 12, 0, 0, 0, 30, 0, 16, 0, 22, 0, 0, 0, 30, 0, 36, 40, 36, 0, 0, 0, 36, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..65537

FORMULA

a(n) = A000010(n) - A173557(n).

a(n) = A318841(n) - A051953(n).

a(A005117(n)) = 0. - Ivan N. Ianakiev, Sep 18 2018

PROG

(PARI)

A173557(n) = factorback(apply(p -> p-1, factor(n)[, 1]));

A319341(n) = (eulerphi(n)-A173557(n));

CROSSREFS

Cf. A000010, A051953, A173557, A318841, A319340, A126864.

Sequence in context: A025120 A025096 A261137 * A086798 A155061 A322016

Adjacent sequences:  A319338 A319339 A319340 * A319342 A319343 A319344

KEYWORD

nonn

AUTHOR

Antti Karttunen, Sep 17 2018

STATUS

approved

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Last modified August 10 20:21 EDT 2022. Contains 356039 sequences. (Running on oeis4.)