%I A001568 M2171 N0867
%S A001568 1,1,2,49,629,6961,38366,1899687,133065253,6482111309
%N A001568 Related to 3-line Latin rectangles.
%D A001568 S. M. Kerawala, The asymptotic number of three-deep Latin rectangles, 
               Bull. Calcutta Math. Soc., 39 (1947), 71-72.
%D A001568 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001568 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A001568 <a href="Sindx_La.html#Latin">Index entries for sequences related to 
               Latin squares and rectangles</a>
%Y A001568 Sequence in context: A041287 A057563 A028479 this_sequence A088067 A145676 
               A027619
%Y A001568 Adjacent sequences: A001565 A001566 A001567 this_sequence A001569 A001570 
               A001571
%K A001568 nonn
%O A001568 1,3
%A A001568 N. J. A. Sloane (njas(AT)research.att.com).