Numbers n with property that n==5 (mod 12) and 2^(m-1)=1 (mod m) where m=(2*n-1)*n.

Terms

a(0) =17a(1) =281a(2) =677a(3) =953a(4) =2729a(5) =4241a(6) =4637a(7) =18749a(8) =55217a(9) =112997a(10) =115769a(11) =148781a(12) =151733a(13) =326693a(14) =623393a(15) =637841a(16) =744833a(17) =907733a(18) =1056833a(19) =1444481a(20) =1774937a(21) =1831481a(22) =1866737a(23) =1939097a(24) =2028197a(25) =2564369a(26) =2566601a(27) =3146237a(28) =4635317a(29) =4777433