a(0) = 2, a(n) = 2^(n+1)*(n-1)! (n >= 1).
A064378
a(0) = 2, a(n) = 2^(n+1)*(n-1)! (n >= 1).
Terms
- a(0) =2a(1) =4a(2) =8a(3) =32a(4) =192a(5) =1536a(6) =15360a(7) =184320a(8) =2580480a(9) =41287680a(10) =743178240a(11) =14863564800a(12) =326998425600
External references
- oeis: A064378