a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(k+3,3) * a(k) * a(n-1-k).
A385952
a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(k+3,3) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =59a(4) =1309a(5) =48790a(6) =2840931a(7) =244770680a(8) =29887602613
External references
- oeis: A385952