a(n) = n * n! * b(n), where b(n) = ((n-1)*(n-3)*b(n-1) - b(n-2) + b(n-3))/(n*(n - 1)) and b(0) = b(1) = 1, b(2) = -1.
A158802
a(n) = n * n! * b(n), where b(n) = ((n-1)*(n-3)*b(n-1) - b(n-2) + b(n-3))/(n*(n - 1)) and b(0) = b(1) = 1, b(2) = -1.
Terms
- a(0) =0a(1) =1a(2) =-4a(3) =0a(4) =16a(5) =10a(6) =12a(7) =182a(8) =1120a(9) =7452a(10) =58640a(11) =520784a(12) =5142144a(13) =55929640a(14) =664505744a(15) =8562670920a(16) =118939979008
External references
- oeis: A158802