A145763 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only either three adjacent vertically or three adjacent horizontally.

1, 1, 1, 1, 4, 7, 16, 35, 133, 363, 1590, 5600, 33892, 154647, 1163836, 6812622, 66760064, 504710757, 6331779830, 61565739001, 996948455181, 12487323542741, 259917683188595, 4189678086571772, 112326942697897637