%I A000794 M2143 N2248
%S A000794 1,2,24,3852,18534400
%N A000794 Permanent of projective plane of order n.
%D A000794 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A000794 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A000794 P. J. Nikolai, Permanents of incidence matrices, Math. Comp., 14 (1960), 
               262-266.
%D A000794 H. J. Ryser, Combinatorial Mathematics. Mathematical Association of America, 
               Carus Mathematical Monograph 14, 1963, p. 124.
%Y A000794 Sequence in context: A111429 A111430 A059332 this_sequence A159907 A088912 
               A055462
%Y A000794 Adjacent sequences: A000791 A000792 A000793 this_sequence A000795 A000796 
               A000797
%K A000794 nonn
%O A000794 1,2
%A A000794 N. J. A. Sloane (njas(AT)research.att.com).