A326046 a(n) = gcd(n-A326039(n), A326040(n)-n).

1, 1, 1, 1, 4, 2, 3, 1, 1, 1, 1, 4, 12, 2, 1, 1, 8, 1, 3, 1, 5, 2, 1, 4, 1, 5, 1, 24, 28, 6, 15, 1, 1, 1, 1, 1, 36, 2, 1, 1, 40, 2, 3, 4, 4, 10, 1, 4, 1, 7, 15, 3, 4, 2, 19, 4, 1, 1, 1, 8, 60, 2, 1, 1, 1, 6, 3, 1, 1, 2, 35, 1, 72, 1, 1, 12, 1, 2, 3, 1, 1, 1, 1, 4, 1, 2, 1, 4, 8, 27, 5, 8, 29, 2, 7, 60, 48, 1, 1, 1, 100, 6, 3, 1, 1

Offset

1,5

Links

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

Formula

a(n) = gcd(A326044(n), A326045(n)) = gcd(n-A326039(n), A326040(n)-n).

Prog

(PARI)
A008833(n) = (n/core(n));
A326039(n) = A008833(sigma(n));
A326040(n) = (sigma(n)-A008833(sigma(n)));
A326046(n) = gcd(n-A326039(n), A326040(n)-n);

Crossrefs

Cf. A000203, A008833, A326039, A326040, A326044, A326045.

Cf. also A009194, A325385, A325813, A325975, A326047, A326048, A326056, A326057, A326060, A326062, A326129, A326130, A326140, A326144.

Sequence in context: A232462 A266141 A266147 * A231169 A297847 A145326

Adjacent sequences: A326043 A326044 A326045 * A326047 A326048 A326049

Keyword

nonn,changed

Author

Antti Karttunen, Jun 06 2019

Status

approved