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Search: id:A091305
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| A091305 |
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Primes of the form p*q - p - q, where p and q are primes. |
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+0
1
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| 3, 5, 7, 11, 17, 19, 23, 29, 31, 41, 43, 47, 59, 71, 79, 83, 101, 103, 107, 131, 137, 139, 149, 163, 167, 179, 191, 197, 199, 211, 223, 227, 239, 251, 263, 269, 271, 281, 311, 331, 347, 359, 379, 383, 419, 431, 443, 461, 463, 467, 479, 491, 499, 503, 521, 523
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Some primes have no unique representation (besides of symmetry in p,q!), e.g. 11 with (p,q)=(2,13) and (3,7).
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..1000
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EXAMPLE
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31 is a member with p=3, q=17.
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CROSSREFS
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Primes of the form p*q + p + q: A066938. Primes of the form p*q + p - q: A091301.
Sequence in context: A155542 A082373 A116959 this_sequence A164319 A085498 A128926
Adjacent sequences: A091302 A091303 A091304 this_sequence A091306 A091307 A091308
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KEYWORD
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easy,nice,nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Feb 21 2004
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