a(1) = 1; a(2) = 2; a(n + 1) = 2 * prime(a(n)).

A331937

a(1) = 1; a(2) = 2; a(n + 1) = 2 * prime(a(n)).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =26a(4) =202a(5) =2462a(6) =43954a(7) =1063462a(8) =33076174a(9) =1270908802a(10) =58596709306

External references