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A245274
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Composite terms in sequence {A243937(n)-1}.
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0
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35, 65, 77, 95, 119, 121, 125, 143, 155, 161, 185, 187, 203, 209, 215, 217, 221, 245, 247, 275, 287, 289, 299, 305, 323, 329, 335, 341, 365, 371, 377, 395, 407, 413, 425, 427, 437, 455, 473, 485, 497, 515, 517, 527, 529, 533, 539, 545, 551, 575, 581, 583, 605
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OFFSET
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1,1
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COMMENTS
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If prime p is not in A062326, then p^2 is in the sequence.
If p>3 and p,p+2 are twin primes, then p*(p+2) is in the sequence. Indeed, it can be shown that in this case (p+1)^2 is in A243937. lpf((p+1)^2-1)=p while lpf((p+1)^2-3)=3, since for lesser p>3 of twin prime p+1==0(mod 6).
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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