1073758208domain: NAppears in sequencesa(n) = 2^(2n) + 2^(n-1).at n=14A164051a(n) = 2^(n-2)*(2^(n+4)-(-1)^n+5).at n=14A240525The number of ways of tiling the n X n grid up to diagonal and antidiagonal reflections by a tile that is not fixed under any of these symmetries.at n=3A367529