a(n) = 1 + Sum_{k=0..n-1} 2^k * binomial(n-1,k) * a(k) * a(n-1-k).
A386298
a(n) = 1 + Sum_{k=0..n-1} 2^k * binomial(n-1,k) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =52a(4) =721a(5) =17594a(6) =754063a(7) =58139188a(8) =8321310193
External references
- oeis: A386298