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A294730
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Smallest average >= 6 of a twin prime pair that has exactly 2*n divisors, 0 if no such pair exists.
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2
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6, 12, 30, 0, 60, 192, 270, 180, 240, 0, 420, 0, 2112, 1620, 1320, 0, 2340, 786432, 3120, 4800, 15360, 0, 3360, 388962, 724992, 6300, 29760, 0, 12240, 0, 7560, 617472, 47382528, 81648, 21600, 0, 651952128, 995328, 21840, 0, 33600, 0, 138240
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OFFSET
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2,1
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COMMENTS
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It is conjectured that a(n)=0 for prime n with the only exceptions given by n=A181490(k)+1, i.e. a(2)=6, a(3)=12, a(7)=192 and a(19)=786432 are the only currently known exceptions.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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