a(n) = ((2 + sqrt(2))^n - (2 - sqrt(2))^n)^2/8.
A144844
a(n) = ((2 + sqrt(2))^n - (2 - sqrt(2))^n)^2/8.
Terms
- a(0) =0a(1) =1a(2) =16a(3) =196a(4) =2304a(5) =26896a(6) =313600a(7) =3655744a(8) =42614784a(9) =496754944a(10) =5790601216a(11) =67500196864a(12) =786839961600
External references
- oeis: A144844