a(n) = 4^n * n! * binomial(7*n/4,n) * Sum_{k=1..n} 1/(3*n+4*k).
A384172
a(n) = 4^n * n! * binomial(7*n/4,n) * Sum_{k=1..n} 1/(3*n+4*k).
Terms
- a(0) =1a(1) =24a(2) =851a(3) =40832a(4) =2483269a(5) =183241728a(6) =15912395295
External references
- oeis: A384172