12410211123581321F（n）=F（n-1）+F（n-2）n3F（1）=1F（2）=12-1-2-3-1-33-1-3-2-10.6181202813813891441442332-1-2-3-1-33-1-3-2-14-2-1-3-11-1-1-3-2