%I A059422
%S A059422 1,1,0,1,1,3,2,25,213,1547,13276,129069,1375775,16009741,202184274,
%T A059422 2753591087,40231298023,627731583225,10418193719432,183264681827863,
%U A059422 3406106373633009,66695477905719251,1372395141298236250,29607108539572186329
%V A059422 1,1,0,-1,-1,3,-2,25,-213,1547,-13276,129069,-1375775,16009741,-202184274,
%W A059422 2753591087,-40231298023,627731583225,-10418193719432,183264681827863,
%X A059422 -3406106373633009,66695477905719251,-1372395141298236250,29607108539572186329
%N A059422 Difference between number of even equivalence classes and odd classes 
               of terms in a symmetric determinant of order n.
%D A059422 L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 260, #12, a'_n.
%F A059422 E.g.f.: exp(1/2*t-1/4*t^2)*(1+t)^(1/2)
%Y A059422 Cf. A002135.
%Y A059422 Sequence in context: A100645 A132960 A009574 this_sequence A102056 A065353 
               A046272
%Y A059422 Adjacent sequences: A059419 A059420 A059421 this_sequence A059423 A059424 
               A059425
%K A059422 sign
%O A059422 0,6
%A A059422 N. J. A. Sloane (njas(AT)research.att.com), Jan 30 2001