a(n) = 1 + Sum_{k=0..n-1} (k+1)^2 * a(k) * a(n-k-1).
A376126
a(n) = 1 + Sum_{k=0..n-1} (k+1)^2 * a(k) * a(n-k-1).
Terms
- a(0) =1a(1) =2a(2) =11a(3) =127a(4) =2446a(5) =69766a(6) =2758136a(7) =144660949a(8) =9742594594a(9) =820936644105
External references
- oeis: A376126