a(n) = Sum_{k=0..n} binomial(n,k) * binomial(3*n+2*k,k).
A386542
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(3*n+2*k,k).
Terms
- a(0) =1a(1) =6a(2) =62a(3) =723a(4) =8886a(5) =112501a(6) =1451771a(7) =18985749a(8) =250742598a(9) =3336645612a(10) =44667605997a(11) =600879118527
External references
- oeis: A386542