Recurrence: a(n) = Sum_{k=0..n-1} (k+1)*(n-k)*a(k)*a(n-k-1) for n>0, with a(0)=1.
A112915
Recurrence: a(n) = Sum_{k=0..n-1} (k+1)*(n-k)*a(k)*a(n-k-1) for n>0, with a(0)=1.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =28a(4) =272a(5) =3312a(6) =47872a(7) =794880a(8) =14840064a(9) =306900736a(10) =6953989120a(11) =171200048128
External references
- oeis: A112915