a(n) = 3^n * n! * binomial(5*n/3,n) * Sum_{k=1..n} 1/(2*n+3*k).
A384170
a(n) = 3^n * n! * binomial(5*n/3,n) * Sum_{k=1..n} 1/(2*n+3*k).
Terms
- a(0) =1a(1) =17a(2) =423a(3) =14198a(4) =603194a(5) =31069980a(6) =1882538440a(7) =131223122480
External references
- oeis: A384170