Least k such that (2*p_n)*k + 1 | Mersenne(p_n), p_n = n-th prime, n >= 2.

Terms

a(0) =1a(1) =3a(2) =9a(3) =1a(4) =315a(5) =3855a(6) =13797a(7) =1a(8) =4a(9) =34636833a(10) =3a(11) =163a(12) =5a(13) =25a(14) =60a(15) =1525a(17) =1445580a(18) =1609a(19) =3a(20) =17a(21) =1a(23) =59a(24) =36793758459a(25) =12379533a(27) =3421967a(28) =15