[GAP Forum] Find all sugroups of dihedral groups of order 2^{n}, n =3, 4, ...

[EniOluwafe, Michael]

Dear GAP Forum,
 
Has anyone tried to use GAP to find all subgroups of dihedral groups of order
 2^{n}, n = 3, 4, ... ?
 
Thanks   for your help.
Michael.