3+5+1=95+9+1=159+15+1=25这个是斐波那契树的顶点个数的子集:1 1 3 5 9 15 25 41.....
A(n)+A(n+1)比A(n+2)小1
3 + 2 = 55 + 4 = 9 9 + 6 = 15 15 + 8 = 23 像没什么规律!