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Search: id:A072459
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A072459 Largest prime divisor of even nontotients. +0
1
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 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n)=A006530[A005277(n)]

EXAMPLE

12nd even nontotient is 94-2.47, a(12)=47.

CROSSREFS

Cf. A006530, A005277.

Sequence in context: A090503 A059520 A102797 this_sequence A158813 A144426 A118942

Adjacent sequences: A072456 A072457 A072458 this_sequence A072460 A072461 A072462

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Jun 19 2002

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.


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