a(0)=a(1)=1 and a(n) = -(2*n-1)*a(n-1) + a(n-2) for n>=2.
A142722
a(0)=a(1)=1 and a(n) = -(2*n-1)*a(n-1) + a(n-2) for n>=2.
Terms
- a(0) =1a(1) =1a(2) =-2a(3) =11a(4) =-79a(5) =722a(6) =-8021a(7) =104995a(8) =-1582946a(9) =27015077a(10) =-514869409a(11) =10839272666a(12) =-249818140727
External references
- oeis: A142722