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Search: id:A071889
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A071889 GCD(A071888(n),n). +0
6
1, 2, 3, 2, 5, 2, 7, 2, 3, 2, 11, 2, 13, 7, 3, 2, 17, 3, 19, 2, 3, 2, 23, 2, 5, 2, 3, 2, 29, 3, 31, 2, 3, 2, 7, 2, 37, 2, 3, 2, 41, 2, 43, 2, 3, 2, 47, 3, 7, 5, 3, 2, 53, 3, 5, 2, 3, 2, 59, 2, 61, 2, 3, 2, 5, 3, 67, 2, 3, 2, 71, 2, 73, 2, 3, 2, 7, 2, 79, 2, 3, 2, 83, 2, 5, 2, 3 (list; graph; listen)
OFFSET

1,2

COMMENT

For n>1: a(n)=n iff n is prime.

CROSSREFS

Cf. A071892.

Adjacent sequences: A071886 A071887 A071888 this_sequence A071890 A071891 A071892

Sequence in context: A020639 A092067 A079879 this_sequence A091963 A067695 A079866

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 10 2002

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.


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