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%I #18 Jun 22 2024 03:39:13
%S 1,2,2,4,7,15,20,62,190,771
%N Number of different values taken by the permanent of a symmetric real (+1,-1)-matrix of order n.
%H Minfeng Wang, <a href="/A118988/a118988_1.cpp.txt">C++ program</a>.
%Y Cf. A087983, A118987, A118986.
%Y Cf. A006125 (number of symmetric real (+1,-1)-matrices of order (n-1)).
%K nonn,more,changed
%O 0,2
%A _Giovanni Resta_, May 08 2006
%E a(8)-a(9) from _Minfeng Wang_, Jun 20 2024
%E a(0)=1 prepended by _Alois P. Heinz_, Jun 21 2024
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