A146246 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-010 pattern in any orientation.

1, 1, 1, 1, 1, 1, 11, 21, 35, 67, 259, 945, 3949, 14269, 69629, 358835, 2304465, 14395141, 109376391, 851675891, 8461569139, 84383219157, 1033770596811, 12613520889815, 192843929142189, 2993789320611135