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%I #28 Oct 16 2019 05:50:13
%S 3,11,31,79,191,5119,245759,524287,1114111,3758096383,
%T 1618481116086271,653980173926178609468673073657929531391,
%U 5359447279004780799548150067050349330431
%N Primes of the form k*2^(k-1) - 1.
%C Primes in A087323.
%C Corresponding values of k: 2, 3, 4, 5, 6, 10, 15, 16, 17, 28, 46, 123, ...
%C The values of k-1 are listed in A230769. - _Jeppe Stig Nielsen_, Oct 16 2019
%e 79 is in this sequence because it is prime and for k = 5, k*2^(k-1) - 1 = 5*2^(5-1) - 1 = 79.
%Y Cf. A002054, A003261, A196273, A230769.
%K nonn
%O 1,1
%A _Gerasimov Sergey_, Jan 30 2014
%E More terms and corrections of terms and comments by _Ralf Stephan_, Feb 03 2014