a(1)=a(2)=a(3)=a(4)=1. For n >= 5, a(n)= (a(n-1)+a(n-2)) * (a(n-3)+a(n-4)).
A111236
a(1)=a(2)=a(3)=a(4)=1. For n >= 5, a(n)= (a(n-1)+a(n-2)) * (a(n-3)+a(n-4)).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =10a(6) =28a(7) =190a(8) =3052a(9) =123196a(10) =27522064a(11) =89625932920
External references
- oeis: A111236