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Search: id:A088618
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| A088618 |
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Rearrangement of odd numbers such that every concatenation of at least two terms is composite. |
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+0
1
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| 1, 5, 13, 3, 15, 9, 17, 7, 23, 19, 25, 35, 21, 39, 37, 11, 33, 45, 27, 47, 31, 51, 41, 55, 29, 43, 61, 59, 57, 53, 49, 63, 65, 75, 67, 71, 69, 79, 77, 81, 73, 85, 91, 95, 83, 97, 105, 87, 101, 99, 115, 107, 93, 123, 111, 117, 113, 109, 119, 103, 121, 125, 129, 135, 133, 137
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Conjecture: Sequence is infinite. And every odd number is a member.
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EXAMPLE
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15,513,133,315,1513,5133,13315,15133,513315,1513315 all are composite.
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CROSSREFS
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Sequence in context: A065934 A035412 A065865 this_sequence A121645 A057691 A089619
Adjacent sequences: A088615 A088616 A088617 this_sequence A088619 A088620 A088621
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 17 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 18 2003
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