a(n) = 1 + Sum_{k=1..n-1} binomial(n-1,k) * a(k) * a(n-k-1).
A332776
a(n) = 1 + Sum_{k=1..n-1} binomial(n-1,k) * a(k) * a(n-k-1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =18a(5) =83a(6) =464a(7) =3041a(8) =22810a(9) =192595a(10) =1807328a(11) =18658097a(12) =210138882a(13) =2563990859a(14) =33691089824a(15) =474327797585
External references
- oeis: A332776