Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-101 pattern in any orientation.

A146263

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-101 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =33a(6) =133a(7) =785a(8) =3005a(9) =17673a(10) =190185a(11) =2271593a(12) =28110409a(13) =628123625a(14) =14202428649a(15) =408602739063

External references