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%I #13 Sep 14 2024 02:17:12
%S 5,31,103,111,119,201
%N Numbers k such that 1.2. ... .k-1.k - 2 is prime (where dot between numbers means concatenation).
%C Each term is odd and next term is greater than 2200.
%C Any further terms exceed 13000. - _Lucas A. Brown_, Mar 06 2024
%C Any further terms exceed 30000. - _Michael S. Branicky_, Sep 13 2024
%e 31 is in the sequence because 12345678910111213141516171819202122232425262728293031 - 2 is prime.
%Y Cf. A099081, A099082.
%K base,more,nonn
%O 1,1
%A _Farideh Firoozbakht_, Nov 03 2004