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Search: id:A156109
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| A156109 |
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Primes p such that p+18 and p+36 are both prime |
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+0
1
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| 5, 11, 23, 43, 53, 61, 71, 113, 131, 163, 193, 233, 313, 331, 383, 421, 431, 443, 641, 673, 683, 691, 733, 751, 821, 911, 1013, 1033, 1051, 1213, 1283, 1453, 1531, 1583, 1601, 1723, 1741, 1871, 1913, 1993, 2063, 2143, 2203, 2251, 2381, 2423, 2441, 2503
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OFFSET
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1,1
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EXAMPLE
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For p=5, 5+18=23, 5+36=41; p=683, 683+18=701, 683+36=719
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MAPLE
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a := proc (n) if isprime(ithprime(n)+18) = true and isprime(ithprime(n)+36) = true then ithprime(n) else end if end proc: seq(a(n), n = 1 .. 400); [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 02 2009]
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CROSSREFS
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Sequence in context: A147081 A046628 A118439 this_sequence A107010 A052940 A102444
Adjacent sequences: A156106 A156107 A156108 this_sequence A156110 A156111 A156112
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 08 2009
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 02 2009
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