%I #7 Aug 21 2021 10:23:40
%S 3,4,5,6,7,8,27
%N Numbers k such that A072181(k) - 1 is prime.
%Y Cf. A072181, A082463.
%K nonn,hard,more
%O 1,1
%A _Naohiro Nomoto_, Apr 26 2003
