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Table of n, a(n) for n=1..45.
If a(n) = 77 then we find '2'77, '5'77, '6'77, '8'77 and '9'77 to be primes.
Sequence in context: A082536 A057590 A140787 * A007449 A189053 A067649
Adjacent sequences: A032692 A032693 A032694 * A032696 A032697 A032698
Patrick De Geest, May 15, 1998.