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Search: id:A080943
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A080943 Numbers having exactly two divisors that are also suffices in binary representation. +0
6
3, 5, 6, 7, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 31, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 52, 53, 55, 56, 57, 58, 59, 61, 62, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 76, 77, 79, 80, 81, 82, 83, 84, 86, 88, 89, 91, 92 (list; graph; listen)
OFFSET

1,1

COMMENT

A080942(a(n))=2, the two divisors are n and 1 for odd numbers and 2 for even numbers.

CROSSREFS

Cf. A080945, A080944, A007088, A080940, A080941.

Sequence in context: A138591 A136492 A062506 this_sequence A052294 A116883 A047984

Adjacent sequences: A080940 A080941 A080942 this_sequence A080944 A080945 A080946

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 25 2003

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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