

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
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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.


LINKS



EXAMPLE

3*7+2, 5*7+2, 3*5+2, etc. are primes.


CROSSREFS



KEYWORD

nonn,more


AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 05 2003


EXTENSIONS



STATUS

approved



