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Search: id:A109288
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| A109288 |
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Semiprimes equal to p*q + 1, where p and q are distinct primes. |
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+0
4
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| 15, 22, 34, 35, 39, 58, 86, 87, 94, 95, 119, 123, 134, 142, 143, 146, 159, 178, 202, 203, 206, 214, 215, 218, 219, 254, 299, 302, 303, 327, 335, 382, 394, 395, 446, 447, 454, 482, 502, 515, 527, 538, 543, 554, 566, 623, 634, 635, 695, 698, 699, 707, 718, 746
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) for(i=1, 1000, if(bigomega(i)==2&&bigomega(i+1)==2&&issquare(i)==0, print1(i+1, ", "))) (Klasen)
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CROSSREFS
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Cf. A109287, A109289, A109290.
Sequence in context: A038753 A006615 A114867 this_sequence A018889 A065728 A166665
Adjacent sequences: A109285 A109286 A109287 this_sequence A109289 A109290 A109291
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KEYWORD
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nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 20 2005
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EXTENSIONS
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More terms from Lambert Klasen (lambert.klasen(AT)gmx.net), Aug 21 2005
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