a(n) = 4^n*(2*n)!/(n!)^2.
A098430
a(n) = 4^n*(2*n)!/(n!)^2.
Terms
- a(0) =1a(1) =8a(2) =96a(3) =1280a(4) =17920a(5) =258048a(6) =3784704a(7) =56229888a(8) =843448320a(9) =12745441280a(10) =193730707456
External references
- oeis: A098430
A098430
a(n) = 4^n*(2*n)!/(n!)^2.