A377874 - OEIS

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A377874

Parity of A083345(n), where A083345(n) = n' / gcd(n,n') = numerator of Sum(e/p: n=Product(p^e)).

0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0

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OFFSET

COMMENTS

This is one's complement of A369001. See more comments and formulas in that sequence.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..100000

Index entries for characteristic functions

FORMULA

a(n) = A000035(A083345(n))

a(n) = A166486(A276085(n)).

a(n) = 1 - A369001(n).

For all n >= 1, a(n) >= A165560(n), a(n) >= A377868(n).