A072459 Largest prime divisor of even nontotients.

7, 13, 17, 19, 5, 31, 17, 37, 19, 43, 5, 47, 7, 19, 59, 61, 31, 67, 71, 73, 19, 11, 79, 17, 29, 13, 31, 47, 97, 101, 103, 107, 109, 23, 13, 59, 11, 61, 41, 31, 127, 43, 19, 137, 139, 71, 13, 29, 149, 151, 19, 11, 157, 53, 23, 163, 167, 13, 17, 7, 59, 181, 13, 37, 17, 47

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = A006530(A005277(n)).

Example

12th even nontotient is 94=2*47, so a(12)=47.

Crossrefs

Cf. A006530, A005277.

Sequence in context: A102797 A233062 A205686 * A158813 A144426 A233518

Adjacent sequences: A072456 A072457 A072458 * A072460 A072461 A072462

Keyword

nonn

Author

Labos Elemer, Jun 19 2002

Status

approved