%I #5 Mar 17 2019 08:31:46
%S 1,2,2,3,4,6,10,22,46,114,294
%N Number of different nonnegative values taken by the determinant of a real (0,1)-matrix of order n.
%D For references and links see A089472.
%F a(1)=2, a(n) = (A089472(n) + 1) / 2 for n>1
%Y A089472 is the main entry for this sequence. Cf. A003432, A013588, A051236.
%K hard,nonn
%O 0,2
%A _William P. Orrick_, Jan 12 2006
%E a(0)=1 prepended by _Alois P. Heinz_, Mar 17 2019