%I A058975
%S A058975 1,2,12,958,27206608
%N A058975 Total number of flats in the lattice of contractions of the n-cube. Also 
               number of partitions of vertex set of n-cube into blocks all of which 
               induce connected subgraphs.
%D A058975 J. N. Cooper, unpublished.
%e A058975 There are twelve contractions of the 2-cube, also known as the 4-cycle. 
               The edge sets along which the contractions occur are: no edges, any 
               one of the four single edges, one of two opposite pairs, one of four 
               pairs of intersecting edges and all edges.
%Y A058975 Sequence in context: A129933 A064320 A112373 this_sequence A057120 A112512 
               A006751
%Y A058975 Adjacent sequences: A058972 A058973 A058974 this_sequence A058976 A058977 
               A058978
%K A058975 hard,nonn,nice
%O A058975 0,2
%A A058975 Joshua N. Cooper (jcooper(AT)math.ucsd.edu), Jan 15 2001