a(n) = 1 + Sum_{k=0..n-1} k^2 * a(k) * a(n-1-k).
A385840
a(n) = 1 + Sum_{k=0..n-1} k^2 * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =10a(4) =101a(5) =1733a(6) =45303a(7) =1680907a(8) =84166419a(9) =5475072843a(10) =449157456364
External references
- oeis: A385840