A079428 Least coprime m>n with same number of divisors as n, a(1)=1.

1, 3, 5, 9, 7, 35, 11, 15, 25, 21, 13, 175, 17, 15, 22, 81, 19, 175, 23, 63, 22, 27, 29, 385, 49, 27, 34, 45, 31, 1001, 37, 45, 34, 35, 38, 1225, 41, 39, 46, 189, 43, 715, 47, 45, 52, 51, 53, 4375, 121, 63, 55, 63, 59, 385, 57, 135, 58, 65, 61, 7007, 67, 65, 68, 729, 69

Offset

1,2

Comments

tau(a(n)) = tau(n), where tau=A000005;

a(A000040(k)) = A079427(A000040(k)) = A000040(k+1).

Links

Table of n, a(n) for n=1..65.

Crossrefs

Sequence in context: A094549 A029642 A221967 * A094548 A112661 A230725

Adjacent sequences: A079425 A079426 A079427 * A079429 A079430 A079431

Keyword

nonn

Author

Reinhard Zumkeller, Jan 08 2003

Status

approved