making a sequence of numbers in octave and matlab

Question

I know I can make a sequence of numbers in matlab / octave using x=1:1:5 and it will give me 1,2,3,4,5 but how can I get a sequence to be

1,1/2,1/4,1/6,1/8,1/10...

Answer 1

This should work:

1./[1,2.*(1:1:5)]

Answer 2

Try

1./[1,(2:2:20)]

......................