a(n) = (16^n - 1)/5.
A182512
a(n) = (16^n - 1)/5.
Terms
- a(0) =0a(1) =3a(2) =51a(3) =819a(4) =13107a(5) =209715a(6) =3355443a(7) =53687091a(8) =858993459a(9) =13743895347a(10) =219902325555
External references
- oeis: A182512
A182512
a(n) = (16^n - 1)/5.