A295311 a(n) = n / A295310(n) = n / gcd(n, phi(sigma(n))).

1, 1, 3, 2, 5, 3, 7, 1, 3, 5, 11, 1, 13, 7, 15, 8, 17, 3, 19, 5, 21, 11, 23, 3, 5, 13, 27, 7, 29, 5, 31, 8, 33, 17, 35, 1, 37, 19, 13, 5, 41, 21, 43, 11, 15, 23, 47, 4, 49, 5, 17, 26, 53, 27, 55, 7, 57, 29, 59, 5, 61, 31, 21, 32, 65, 11, 67, 17, 69, 35, 71, 3, 73, 37, 5, 19, 77, 13, 79, 4, 81, 41, 83, 7, 85, 43, 87, 11, 89, 5

Offset

1,3

Links

Antti Karttunen, Table of n, a(n) for n = 1..16384

Prog

(PARI) a(n) = n/gcd(n, eulerphi(sigma(n))); \\ Michel Marcus, Nov 23 2017

Crossrefs

Cf. A000010, A000203, A062401, A295301, A295310, A295312, A295314.

Sequence in context: A166477 A124332 A364900 * A246416 A165342 A076605

Adjacent sequences: A295308 A295309 A295310 * A295312 A295313 A295314

Keyword

nonn

Author

Antti Karttunen, Nov 22 2017

Status

approved