a(0)=0, for n >= 1, a(n) = (2^(n-1)-1)*n!.
A052665
a(0)=0, for n >= 1, a(n) = (2^(n-1)-1)*n!.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =18a(4) =168a(5) =1800a(6) =22320a(7) =317520a(8) =5120640a(9) =92534400a(10) =1854316800a(11) =40834886400a(12) =980516275200
External references
- oeis: A052665