a(n) = 2^n * Product_{k=1..n} (4*k*(4*k+2))^(n-k).
A168442
a(n) = 2^n * Product_{k=1..n} (4*k*(4*k+2))^(n-k).
Terms
- a(0) =1a(1) =2a(2) =96a(3) =368640a(4) =237817036800
External references
- oeis: A168442
A168442
a(n) = 2^n * Product_{k=1..n} (4*k*(4*k+2))^(n-k).