a(n) = [x^n] Product_{k=0..2*n-1} (x - (-1)^k * (2*k+1)).
A383704
a(n) = [x^n] Product_{k=0..2*n-1} (x - (-1)^k * (2*k+1)).
Terms
- a(0) =1a(1) =2a(2) =-34a(3) =-540a(4) =26614a(5) =805980a(6) =-66399124a(7) =-2972817848a(8) =343902030758
External references
- oeis: A383704