The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #4 Apr 10 2018 08:28:07
%S 348,5388,17628,46620,129564,211356,342012,518892,736668,1198044
%N Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which generate a group of order four under binary matrix multiplication.
%Y a(n) = 2*A053173(n).
%K nonn
%O 1,1
%A _Ralf W. Grosse-Kunstleve_, Mar 26 2000