Numbers n of the form 4*k+3 such that 2^(m-1) == 1 (mod m) where m = (2*n-1)*n.

Terms

a(0) =47a(1) =67a(2) =2731a(3) =2887a(4) =5827a(5) =13567a(6) =41647a(7) =44851a(8) =46051a(9) =47911a(10) =59671a(11) =61231a(12) =66571a(13) =78439a(14) =90107a(15) =109891a(16) =138007a(17) =141067a(18) =144451a(19) =164011a(20) =183907a(21) =321091a(22) =406591a(23) =430987a(24) =460531a(25) =501187a(26) =513731a(27) =532027a(28) =537587a(29) =554731