Least k such that k*Mersenne - prime(n) + 1 is prime.

Terms

a(0) =2a(1) =4a(2) =10a(3) =4a(4) =46a(5) =12a(6) =16a(7) =46a(8) =52a(9) =136a(10) =166a(11) =114a(12) =336a(13) =154a(14) =1474a(15) =156a(16) =1086a(17) =1816a(18) =2010a(19) =9436a(20) =1746a(21) =3426a(22) =6238a(23) =40138a(24) =858a(25) =4018a(26) =17262a(27) =15418