Number of independent sets in an n-dimensional hypercube modulo symmetries of the hypercube.

0

%I

%S 2,2,3,6,21,288

%N Number of independent sets in an n-dimensional hypercube modulo symmetries of the hypercube.

%e The six independent sets of the 3-cube are: the empty set, one vertex, two vertices on a common facet, two vertices on opposite corners, three neighbors of a vertex and four vertices of a tetrahedron.