a(n) = Sum_{k=0..n} binomial(n,k) * binomial(3*n+4*k,k).
A388728
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(3*n+4*k,k).
Terms
- a(0) =1a(1) =8a(2) =112a(3) =1778a(4) =29776a(5) =513833a(6) =9039286a(7) =161164599a(8) =2902000592a(9) =52652740496a(10) =961069474297
External references
- oeis: A388728