Coefficient of x^2 in the reduction of the n-th Fibonacci polynomial by x^3->x^2+2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =4a(5) =7a(6) =16a(7) =35a(8) =73a(9) =162a(10) =344a(11) =748a(12) =1612a(13) =3478a(14) =7517a(15) =16213a(16) =35020a(17) =75585a(18) =163184a(19) =352295a(20) =760517a(21) =1641880a(22) =3544484a(23) =7652008a(24) =16519388a(25) =35662584a(26) =76989693a(27) =166207785a(28) =358815192a(29) =774622191