n=0 => 2*0-1= -1
n=1 => 2*1-1= 1
n=2 => 2*2-1=3
n=3 => 3*2-1=5
n=4 => 2*4-1=7
n=5=> 2*5-1=9
(Xn):x1,x2,x3,x4,x5,x6.
n=1: x1=2*1-1=1;
n=2: x2=2*2-1=3;
n=3: x3=2*3-1=5;
n=4: x4=2*4-1=7;
n=5: x5=2*5-1=9;
n=6: x6=2*6-1=11;
(Xn):1;3;5;7;9;11.
n=0 => 2*0-1= -1
n=1 => 2*1-1= 1
n=2 => 2*2-1=3
n=3 => 3*2-1=5
n=4 => 2*4-1=7
n=5=> 2*5-1=9
(Xn):x1,x2,x3,x4,x5,x6.
n=1: x1=2*1-1=1;
n=2: x2=2*2-1=3;
n=3: x3=2*3-1=5;
n=4: x4=2*4-1=7;
n=5: x5=2*5-1=9;
n=6: x6=2*6-1=11;
(Xn):1;3;5;7;9;11.