a(n) = A002426(n)^n, where A002426 is the central trinomial coefficients.
A225328
a(n) = A002426(n)^n, where A002426 is the central trinomial coefficients.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =343a(4) =130321a(5) =345025251
External references
- oeis: A225328