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A324045 a(n) = A000010(n) - A106316(n). 5
1, 0, 0, 1, 0, 2, 0, 2, 5, 0, 0, 0, 0, -2, -4, 6, 0, -6, 0, -8, -8, -6, 0, -4, 7, -8, 17, 12, 0, -16, 0, 13, 17, -12, 15, -3, 0, -14, 19, 6, 0, 6, 0, 8, -12, -18, 0, 4, 9, -1, 23, 6, 0, 0, 36, -8, 25, -24, 0, -32, 0, -26, 33, 29, 40, -10, 0, 2, 29, -34, 0, 12, 0, -32, 37, 0, 40, -18, 0, -24, 12, -36, 0, -4, 48, -38, 35, -36, 0, -30, 44, -4, 37, -42, 52, -16, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

FORMULA

a(n) = A000010(n) - A106316(n).

PROG

(PARI)

A106315(n) = (n*numdiv(n) % sigma(n));

A106316(n) = (A106315(n) % n);

A324045(n) = (eulerphi(n) - A106316(n));

CROSSREFS

Cf. A000005, A000010, A000203, A106316, A324046, A324047.

Sequence in context: A067648 A279327 A052438 * A209701 A158855 A005074

Adjacent sequences:  A324042 A324043 A324044 * A324046 A324047 A324048

KEYWORD

sign

AUTHOR

Antti Karttunen, Feb 13 2019

STATUS

approved

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Last modified August 11 00:32 EDT 2020. Contains 336403 sequences. (Running on oeis4.)