$a)1,2,4,8,16,32,64$

$b)1,2,3,4,6,8,12,16,24,48$

$c)1,2,3,6,9,18,27,54$

$d)1,2,3,4,5,6,\dots$

$e)1,2,3,5,9,10,15,18,30,45,90$