Least k such that gcd(prime(k+1)-1, prime(k)-1) = 2n.

Terms

a(0) =2a(1) =6a(2) =11a(3) =24a(4) =42a(5) =121a(6) =30a(7) =319a(8) =99a(9) =1592a(10) =344a(11) =574a(12) =3786a(13) =4196a(14) =650a(15) =4619a(16) =217a(17) =1532a(18) =11244a(19) =5349a(20) =8081a(21) =3861a(22) =12751a(23) =18281a(24) =9221a(25) =5995a(26) =22467a(27) =16222a(28) =43969a(29) =35975