a(n) = n! * C(n+2, 2) * 2^(n+1).
A014297
a(n) = n! * C(n+2, 2) * 2^(n+1).
Terms
- a(0) =2a(1) =12a(2) =96a(3) =960a(4) =11520a(5) =161280a(6) =2580480a(7) =46448640a(8) =928972800a(9) =20437401600a(10) =490497638400
External references
- oeis: A014297
A014297
a(n) = n! * C(n+2, 2) * 2^(n+1).