A146241 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-010 pattern in any orientation.

1, 1, 1, 1, 1, 1, 37, 73, 549, 1155, 18213, 46753, 1912543, 6241489, 625732277, 2571374751, 388840217669, 1994859107661, 608353553481999, 3912610945442677, 2428168209787780883, 19568752353921733413, 24097482751802550964553