505019158608domain: NAppears in sequencesa(n) = 5*F(n)^2 + 3*(-1)^n where F(n) are the Fibonacci numbers A000045.at n=28A047946a(n) = Lucas(2*n) + 1.at n=28A065034Number of odd chordless cycles in the 2n-Moebius ladder graph.at n=28A301773