a(n) = (2*n-3)*a(n-1) - 2*a(n-2), a(0)=0, a(1)=1.
A256710
a(n) = (2*n-3)*a(n-1) - 2*a(n-2), a(0)=0, a(1)=1.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =19a(6) =165a(7) =1777a(8) =22771a(9) =338011a(10) =5700645a(11) =107636233a(12) =2248959603a(13) =51510798403
External references
- oeis: A256710