A358061 - OEIS

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A358061

a(n) = phi(n) mod tau(n).

0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0, 4, 0, 2, 0, 3, 0, 0, 0, 2, 0, 2, 0, 0, 2, 0, 2, 0, 0, 0, 0, 4, 0, 0, 0, 3, 0, 2, 0, 0, 0, 4, 0, 2, 0, 2, 0, 6, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 4, 0, 2, 0, 4, 0, 4, 0, 2, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 2, 4, 0, 0, 0, 0, 2, 0, 0, 0, 0

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OFFSET

1,4

COMMENTS

a(n) > 0 for n in A015733, a(n) = 0 for n in A020491.

LINKS

Table of n, a(n) for n=1..90.

FORMULA

a(n) = A000010(n) mod A000005(n).

EXAMPLE

For n = 4; a(4) = A000010(4) mod A000005(4) = 2 mod 3 = 2.

MATHEMATICA