a(n) = 1 + C(2,1)^3 + C(4,2)^3 + ... + C(2n,n)^3.
A079727
a(n) = 1 + C(2,1)^3 + C(4,2)^3 + ... + C(2n,n)^3.
Terms
- a(0) =1a(1) =9a(2) =225a(3) =8225a(4) =351225a(5) =16354233a(6) =805243257a(7) =41229480825
External references
- oeis: A079727
A079727
a(n) = 1 + C(2,1)^3 + C(4,2)^3 + ... + C(2n,n)^3.