a(n) = (2^prime(n)-2)/prime(n); a(0) = 0 by convention.
A064535
a(n) = (2^prime(n)-2)/prime(n); a(0) = 0 by convention.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =6a(4) =18a(5) =186a(6) =630a(7) =7710a(8) =27594a(9) =364722a(10) =18512790a(11) =69273666a(12) =3714566310a(13) =53634713550a(14) =204560302842
External references
- oeis: A064535