Least k such that k*A000668(n)*A000668(n+2) + 1 is prime, where A000668(n) is the n-th Mersenne prime.

A365063

Least k such that k*A000668(n)*A000668(n+2) + 1 is prime, where A000668(n) is the n-th Mersenne prime.

Terms

    a(0) =4a(1) =4a(2) =6a(3) =34a(4) =4a(5) =18a(6) =4a(7) =10a(8) =34a(9) =60a(10) =208a(11) =442a(12) =976a(13) =1548a(14) =1918a(15) =1726a(16) =3828a(17) =210a(18) =17940a(19) =34254a(20) =1852a(21) =19986a(22) =7728a(23) =22186a(24) =9966

External references