A324046 a(n) = gcd(n, A106316(n)).

1, 1, 1, 1, 1, 6, 1, 2, 1, 2, 1, 4, 1, 2, 3, 2, 1, 6, 1, 4, 1, 2, 1, 12, 1, 2, 1, 28, 1, 6, 1, 1, 3, 2, 1, 3, 1, 2, 1, 10, 1, 6, 1, 4, 9, 2, 1, 12, 1, 1, 3, 2, 1, 18, 1, 8, 1, 2, 1, 12, 1, 2, 3, 1, 1, 6, 1, 2, 3, 2, 1, 12, 1, 2, 3, 4, 1, 6, 1, 8, 3, 2, 1, 28, 1, 2, 3, 4, 1, 18, 7, 4, 1, 2, 5, 48, 1, 1, 9, 4, 1, 6, 1, 2, 3

Offset

1,6

Links

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

Formula

a(n) = gcd(n, A106316(n)).

Prog

(PARI)
A106315(n) = (n*numdiv(n) % sigma(n));
A106316(n) = (A106315(n) % n);
A324046(n) = gcd(n, A106316(n));

Crossrefs

Cf. A000005, A000203, A106315, A106316, A324045, A324047.

Sequence in context: A111825 A085552 A002950 * A244059 A121090 A321991

Adjacent sequences: A324043 A324044 A324045 * A324047 A324048 A324049

Keyword

nonn

Author

Antti Karttunen, Feb 13 2019

Status

approved