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

Terms

a(0) =0a(1) =1a(2) =0a(3) =2a(4) =2a(5) =5a(6) =12a(7) =22a(8) =54a(9) =109a(10) =242a(11) =520a(12) =1118a(13) =2427a(14) =5218a(15) =11290a(16) =24352a(17) =52579a(18) =113526a(19) =245038a(20) =529068a(21) =1142087a(22) =2465644a(23) =5322896a(24) =11491188a(25) =24807721a(26) =53555508a(27) =115617714a(28) =249599214a(29) =538843277