|fn | |1,0,1,1| |fn-1| |fn-1| |1,0,0,0| |fn-2| |fn-2| = |0,1,0,0|*|fn-3| |fn-3| |0,0,1,0
然后把上面的加起来就得到了递推公式: f(n)= f(n - 1)+ f(n - 3)+ f(n - 4) 然后是矩阵的构造了, 如图: (突然发现上面最后一个式子有误,后面的应该是(fn fn-1 fn-2 fn