a(1)=1, a(2)=0, a(n) = (4*n-2)*a(n-1) + a(n-2), n > 2.
A343688
a(1)=1, a(2)=0, a(n) = (4*n-2)*a(n-1) + a(n-2), n > 2.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =14a(4) =253a(5) =5580a(6) =145333a(7) =4365570a(8) =148574713a(9) =5650204664a(10) =237457170601
External references
- oeis: A343688