Numerator of u(n) where u(n) = (u(n-1) + u(n-2)) * (u(n-2) + u(n-3)) / u(n-4) with u(0) = -1, u(1) = u(2) = u(3) = 1.
A248048
Numerator of u(n) where u(n) = (u(n-1) + u(n-2)) * (u(n-2) + u(n-3)) / u(n-4) with u(0) = -1, u(1) = u(2) = u(3) = 1.
Terms
- a(0) =-1a(1) =1a(2) =1a(3) =1a(4) =-4a(5) =-6a(6) =30a(7) =-240a(8) =1260a(9) =35700a(10) =1256640a(11) =-199020360a(12) =-202839655480
External references
- oeis: A248048