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Search: id:A133762
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| A133762 |
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Odd composite numbers such that the sum of any two terms, plus 1, is a prime. |
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+0
1
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| 9, 21, 49, 51, 57, 141, 1011, 2661, 21471, 64869, 357561, 1750989, 5409570201, 107563623099, 657637783581
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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49 is a term in the sequence because 49 is an odd composite, 49+9+1=59 and 49+21+1=71, are both primes.
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CROSSREFS
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Sequence in context: A020137 A020190 A135187 this_sequence A160414 A118130 A144482
Adjacent sequences: A133759 A133760 A133761 this_sequence A133763 A133764 A133765
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KEYWORD
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more,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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EXTENSIONS
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3 more terms from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 06 2008
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