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Search: id:A130737
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| A130737 |
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Primes n such that n+2, n*(n+2)+18 and n*(n+2)+20 are also prime. |
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+0
2
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| 419, 2309, 16631, 17387, 17597, 22637, 32297, 49937, 51239, 61151, 66947, 122387, 124907, 136751, 148721, 148931, 152459, 182027, 183917, 189251, 203909, 209579, 228521, 246707, 251789, 291689, 324617, 371027, 388961, 408701, 409289
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OFFSET
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1,1
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MAPLE
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a:=proc(n)local p: p:=ithprime(n): if isprime(p+2)=true and isprime(p*(p+2)+18)=true and isprime(p*(p+2)+20)=true then p else end if end proc: seq(a(n), n= 1..40000); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 28 2007
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CROSSREFS
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Sequence in context: A142281 A142733 A060230 this_sequence A061118 A097822 A069064
Adjacent sequences: A130734 A130735 A130736 this_sequence A130738 A130739 A130740
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KEYWORD
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nonn
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AUTHOR
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Ray G. Opao (1260(AT)email.com), Jul 06 2007
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 28 2007
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