Numbers n such that 123*2^n-1 is prime.

Terms

a(0) =2a(1) =3a(2) =11a(3) =15a(4) =23a(5) =24a(6) =27a(7) =35a(8) =71a(9) =84a(10) =108a(11) =122a(12) =123a(13) =138a(14) =236a(15) =242a(16) =290a(17) =392a(18) =500a(19) =611a(20) =747a(21) =771a(22) =1106a(23) =1490a(24) =3560a(25) =5111a(26) =6066a(27) =8660a(28) =8927a(29) =19451