a(n) = 1 + Sum_{k=0..n-1} (k+1)^3 * a(k) * a(n-k-1).
A376127
a(n) = 1 + Sum_{k=0..n-1} (k+1)^3 * a(k) * a(n-k-1).
Terms
- a(0) =1a(1) =2a(2) =19a(3) =565a(4) =38056a(5) =4886164a(6) =1071397370a(7) =370880032881
External references
- oeis: A376127
A376127
a(n) = 1 + Sum_{k=0..n-1} (k+1)^3 * a(k) * a(n-k-1).