%I A004032 M3289
%S A004032 1,1,4,6,23
%N A004032 Number of n-dimensional crystal families.
%D A004032 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A004032 H. Brown, R. B\"{u}low, J. Neub\"{u}ser, H. Wondratschek and H. Zassenhaus, 
               Crystallographic Groups of Four-Dimensional Space. Wiley, NY, 1978, 
               p. 52.
%Y A004032 Sequence in context: A061595 A062940 A075813 this_sequence A107952 A123046 
               A087784
%Y A004032 Adjacent sequences: A004029 A004030 A004031 this_sequence A004033 A004034 
               A004035
%K A004032 hard,nonn,nice
%O A004032 0,3
%A A004032 N. J. A. Sloane (njas(AT)research.att.com).