Right-hand diagonal of triangle A259879.
A259880
Right-hand diagonal of triangle A259879.
Terms
- a(0) =1a(1) =-1a(2) =2a(3) =-18a(4) =168a(5) =-1920a(6) =25920a(7) =-418320
External references
- oeis: A259880
A259880
Right-hand diagonal of triangle A259879.