A083518 revision #6
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A083518
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Beginning with 3, a(i)*a(j) + 2 is prime for all i,j, i<>j.
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1
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3, 5, 7, 27, 45, 495, 3615, 16695, 533445, 832305, 122789427, 8705408757, 77597861913
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OFFSET
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1,1
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COMMENTS
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From 2nd term onwards, terms have the form 10k+5 or 10k+7. Conjecture: sequence is finite.
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LINKS
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EXAMPLE
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3*7 +2, 5*7+2, 3*5+2, etc. are primes.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 05 2003
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EXTENSIONS
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STATUS
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approved
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