A339913 a(n) = x/gcd(n,x), where x = 1+A060681(n).

1, 1, 1, 3, 1, 2, 1, 5, 7, 3, 1, 7, 1, 4, 11, 9, 1, 5, 1, 11, 5, 6, 1, 13, 21, 7, 19, 15, 1, 8, 1, 17, 23, 9, 29, 19, 1, 10, 9, 21, 1, 11, 1, 23, 31, 12, 1, 25, 43, 13, 35, 27, 1, 14, 9, 29, 13, 15, 1, 31, 1, 16, 43, 33, 53, 17, 1, 35, 47, 18, 1, 37, 1, 19, 17, 39, 67, 20, 1, 41, 55, 21, 1, 43, 69, 22, 59, 45, 1, 23

Offset

1,4

Links

Antti Karttunen, Table of n, a(n) for n = 1..65537

Formula

a(n) = (1+A060681(n)) / A323071(n).

Prog

(PARI)
A060681(n) = (n-if(1==n, n, n/vecmin(factor(n)[, 1])));
A339913(n) = { my(x=1+A060681(n)); (x/gcd(n, x)); };

Crossrefs

Cf. A060681, A323071, A323072.

Sequence in context: A366803 A347396 A135261 * A102774 A131918 A010123

Adjacent sequences: A339910 A339911 A339912 * A339914 A339915 A339916

Keyword

nonn

Author

Antti Karttunen, Jan 01 2021

Status

approved