Numbers k > 2 such that 3^(k-1) == 1 (mod k) and gcd(k, 2^(k-1)-1) = 1.

Terms

a(0) =286a(1) =16531a(2) =24046a(3) =49051a(4) =72041a(5) =182527a(6) =192713a(7) =232726a(8) =258017a(9) =327781a(10) =442471a(11) =443713a(12) =453259a(13) =574397a(14) =625873a(15) =652879a(16) =655051a(17) =668431a(18) =705091a(19) =903631a(20) =1236031a(21) =1241143a(22) =1250833a(23) =1287091a(24) =1304446a(25) =1309111a(26) =1351601a(27) =1414639a(28) =1563151a(29) =1817743