a(n) = 1 + Sum_{k=0..n-1} binomial(k+4,5) * a(k) * a(n-1-k).
A385877
a(n) = 1 + Sum_{k=0..n-1} binomial(k+4,5) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =14a(4) =309a(5) =17637a(6) =2240632a(7) =566921596a(8) =262489646519
External references
- oeis: A385877