a(n) = 2^(p - 2)*(2^p - 2), where p = prime(n).
A141083
a(n) = 2^(p - 2)*(2^p - 2), where p = prime(n).
Terms
- a(0) =2a(1) =12a(2) =240a(3) =4032a(4) =1047552a(5) =16773120a(6) =4294901760a(7) =68719214592
External references
- oeis: A141083
A141083
a(n) = 2^(p - 2)*(2^p - 2), where p = prime(n).