已知数列{an}满足a1=1，an=2an-1+1，则an= ___ ．

若数列{An}满足An+1=An^2,则称数列{An}为“平方递推数列”,已知数列{an}中,a1=9,点（an,an+ 已知数列{an}满足a1=2,an+1=2an/an+2,则an等于多少 已知数列{an}满足an+1=an+n,a1等于1,则an=? 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列an满足条件a1=-2 an+1=2an+1则a5 已知数列{an}满足a1=2，an+1=2an+3． 已知数列{an}满足a1=100，an+1-an=2n，则a 数列an满足a1=2,an+1=4an+9,则an=? 已知数列{an}满足：a1=3,an+1=（3an-2）/an ,n∈N*．（Ⅰ）证明数列{(an-1)/an-2 已知数列an满足a1=1,1/an+1=根号1/an^2+2,an>0,求an 已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an 已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列