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Search: id:A046642
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A046642 Numbers n such that n and number of divisors d(n) are relatively prime. +0
1
1, 3, 4, 5, 7, 11, 13, 15, 16, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 47, 49, 51, 53, 55, 57, 59, 61, 64, 65, 67, 69, 71, 73, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 100, 101, 103, 105, 107, 109, 111, 113, 115, 119, 121, 123, 125, 127, 129, 131 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A009191, A009230.

Sequence in context: A091428 A047499 A082378 this_sequence A140826 A081735 A107036

Adjacent sequences: A046639 A046640 A046641 this_sequence A046643 A046644 A046645

KEYWORD

nonn,nice,easy

AUTHOR

Labos Elemer (LABOS(AT)ana.sote.hu)

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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