a(n) = ((3^n - 1)*(3^n + 1))^2/2^(7 - (n mod 2)).
A152258
a(n) = ((3^n - 1)*(3^n + 1))^2/2^(7 - (n mod 2)).
Terms
- a(0) =0a(1) =1a(2) =50a(3) =8281a(4) =336200a(5) =54479161a(6) =2206472450a(7) =357449732641
External references
- oeis: A152258
A152258
a(n) = ((3^n - 1)*(3^n + 1))^2/2^(7 - (n mod 2)).