a(n) = (2^prime(n) + 2^prime(n+1)) / 4.
A137781
a(n) = (2^prime(n) + 2^prime(n+1)) / 4.
Terms
- a(0) =3a(1) =10a(2) =40a(3) =544a(4) =2560a(5) =34816a(6) =163840a(7) =2228224a(8) =136314880a(9) =671088640a(10) =34896609280a(11) =584115552256
External references
- oeis: A137781