a(n) = Product_{j=0..floor(n/2)} binomial(n,j).
A061778
a(n) = Product_{j=0..floor(n/2)} binomial(n,j).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =24a(4) =50a(5) =1800a(6) =5145a(7) =878080a(8) =3429216a(9) =2857680000a(10) =15219319500
External references
- oeis: A061778