a(n) = a(n-1)*a(n-2)*a(n-3)*(1+1/(n-3)), a(1)=a(2)=a(3)=1.
A072043
a(n) = a(n-1)*a(n-2)*a(n-3)*(1+1/(n-3)), a(1)=a(2)=a(3)=1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =8a(6) =60a(7) =1728a(8) =967680a(9) =114661785600
External references
- oeis: A072043