a(n) = ((1+sqrt(11))^n-(1-sqrt(11))^n)^2/44.

A144044

a(n) = ((1+sqrt(11))^n-(1-sqrt(11))^n)^2/44.

Terms

    a(0) =1a(1) =4a(2) =196a(3) =2304a(4) =55696a(5) =906304a(6) =18181696a(7) =325730304a(8) =6199357696a(9) =114211554304

External references