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 A083518 Beginning with 3, a(i)*a(j) + 2 is prime for all i, j, i<>j. 1
 3, 5, 7, 27, 45, 495, 3615, 16695, 533445, 832305, 122789427, 8705408757, 77597861913 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms have the form 10*k+3, 10*k+5, or 10*k+7. [Corrected by Pontus von Brömssen, Oct 12 2023] Conjecture: sequence is finite. Next term is > 266*10^9. - David Wasserman, Nov 22 2004 LINKS Table of n, a(n) for n=1..13. EXAMPLE 3*7+2, 5*7+2, 3*5+2, etc. are primes. CROSSREFS Cf. A083519. Sequence in context: A126670 A126669 A126668 * A352106 A061944 A288924 Adjacent sequences: A083515 A083516 A083517 * A083519 A083520 A083521 KEYWORD nonn,more AUTHOR Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 05 2003 EXTENSIONS More terms from David Wasserman, Nov 22 2004 STATUS approved

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Last modified May 20 02:31 EDT 2024. Contains 372703 sequences. (Running on oeis4.)