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Search: id:A133763
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| A133763 |
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Odd composite numbers such that the sum of any two terms, plus 1, is composite. |
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+0
1
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| 9, 15, 35, 39, 75, 119, 125, 209, 249, 279, 285, 287, 435, 545, 749, 779, 825, 939, 1065, 1469, 1505, 1635, 1655, 2525, 3107, 3339, 3689, 3705, 3999, 4569, 4905, 5175, 6125, 6419, 7475, 8055, 8855, 9449, 9659, 10239, 11379, 14069, 15135, 16169, 20699
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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35 is a term in the sequence because 35 is an odd composite, 35+9+1=45 is composite, and 35+15+1=51 is composite. 33 is not a term in the sequence because 33+9+1 is prime (43).
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CROSSREFS
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Sequence in context: A111148 A125216 A058505 this_sequence A146475 A100556 A057478
Adjacent sequences: A133760 A133761 A133762 this_sequence A133764 A133765 A133766
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KEYWORD
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easy,nonn
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AUTHOR
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Randy L. Ekl (Randy.Ekl(AT)Motorola.com), Jan 01 2008
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