a(n) = 1 + Sum_{k=0..n-1} (1 + k^2) * a(k) * a(n-1-k).
A385835
a(n) = 1 + Sum_{k=0..n-1} (1 + k^2) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =51a(4) =660a(5) =13350a(6) =390886a(7) =15728919a(8) =836469748a(9) =56989647229
External references
- oeis: A385835