a(n) = n!*(n+1)!*(n+2)!*(n+3)!*(n+4)! / ( 2!*3!*4!*5! ).
A010799
a(n) = n!*(n+1)!*(n+2)!*(n+3)!*(n+4)! / ( 2!*3!*4!*5! ).
Terms
- a(0) =1a(1) =720a(2) =1814400a(3) =12192768000
External references
- oeis: A010799
A010799
a(n) = n!*(n+1)!*(n+2)!*(n+3)!*(n+4)! / ( 2!*3!*4!*5! ).