a(n) = Product_{i=1..2*n} (4*i+2)*A060818(n).
A220371
a(n) = Product_{i=1..2*n} (4*i+2)*A060818(n).
Terms
- a(0) =1a(1) =60a(2) =30240a(3) =17297280a(4) =70572902400
External references
- oeis: A220371
A220371
a(n) = Product_{i=1..2*n} (4*i+2)*A060818(n).