%I A000679 M1470 N0581
%S A000679 1,1,2,5,14,51,267,2328,56092,10494213,49487365422
%N A000679 Number of groups of order 2^n.
%D A000679 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A000679 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A000679 H.-U. Besche and B. Eick, Construction of Finite Groups, Journal of Symbolic 
               Computation, Vol. 27, No. 4, Apr 15 1999, pp. 387-404.
%D A000679 H.-U. Besche and B. Eick, The Groups of Order at Most 1000 Except 512 
               and 768, Journal of Symbolic Computation, Vol. 27, No. 4, Apr 15 
               1999, pp. 405-413.
%D A000679 Hans Ulrich Besche; Bettina Eick; E. A. O'Brien, The groups of order 
               at most 2000, Electron. Res. Announc. Amer. Math. Soc. 7 (2001), 
               1-4.
%D A000679 Eick, Bettina; O'Brien, E. A.; Enumerating p-groups. Group theory. J. 
               Austral. Math. Soc. Ser. A 67 (1999), no. 2, 191-205.
%D A000679 James, R.; Newman, M. F.; and O'Brien, E. A. ``The Groups of Order 128.'' 
               J. Algebra 129, 136-158, 1990.
%D A000679 M. Hall, Jr. and J. K. Senior, The Groups of Order 2^n (n <= 6). Macmillan, 
               NY, 1964.
%D A000679 G. A. Miller, Determination of all the groups of order 64, Amer. J. Math., 
               52 (1930), 617-634.
%D A000679 Newman, M. F. and O'Brien, E. A.; A CAYLEY library for the groups of 
               order dividing 128. Group theory (Singapore, 1987), 437-442, de Gruyter, 
               Berlin-New York, 1989.
%D A000679 O'Brien, E. A. ``The Groups of Order 256.'' J. Algebra 143, 219-235, 
               1991.
%D A000679 Rodemich, Eugene, The groups of order 128. J. Algebra 67 (1980), no. 
               1, 129-142.
%D A000679 M. Wild, The groups of order 16 made easy, Amer. Math. Monthly, 112 (No. 
               1, 2005), 20-31.
%D A000679 James Gleick, Faster, Vintage Books, NY, 2000 (see pp. 259-261).
%H A000679 H.-U. Besche, <a href="http://www.math.rwth-aachen.de/~Hans-Ulrich.Besche/
               small.html">The Small Groups library</a>
%H A000679 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               FiniteGroup.html">Link to a section of The World of Mathematics.</
               a>
%H A000679 <a href="Sindx_Gre.html#groups">Index entries for sequences related to 
               groups</a>
%Y A000679 Cf. A000001, A046058.
%Y A000679 Sequence in context: A000109 A049338 A115275 this_sequence A081439 A052649 
               A122594
%Y A000679 Adjacent sequences: A000676 A000677 A000678 this_sequence A000680 A000681 
               A000682
%K A000679 nonn,hard,nice
%O A000679 0,3
%A A000679 N. J. A. Sloane (njas(AT)research.att.com).
%E A000679 a(9) and a(10) found by Eamonn O'Brien.