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Search: id:A089161
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| A089161 |
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Numbers n such that 30*n+17 and 30*n+19 are twin primes. |
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+0
2
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| 0, 3, 4, 6, 7, 11, 20, 27, 28, 42, 47, 49, 53, 55, 56, 59, 62, 66, 67, 69, 74, 75, 88, 89, 105, 108, 115, 117, 118, 125, 130, 137, 138, 140, 144, 150, 151, 154, 159, 165, 180, 182, 188, 195, 206, 227, 231, 237, 243, 248, 249, 251, 258, 262, 269, 279, 284, 286, 287
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OFFSET
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1,2
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EXAMPLE
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30*3+17=107, 30*3+19=109, 107,109 twin primes
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MAPLE
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a:=proc(n) if isprime(30*n+17)=true and isprime(30*n+19)=true then n else fi end: seq(a(n), n=0..400); (Deutsch)
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CROSSREFS
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Adjacent sequences: A089158 A089159 A089160 this_sequence A089162 A089163 A089164
Sequence in context: A085253 A073906 A108797 this_sequence A060965 A153883 A033162
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KEYWORD
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base,easy,nonn
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AUTHOR
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Pierre CAMI (colettecami(AT)aol.com), Dec 06 2003
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jun 13 2005
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