Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0110-1100-0111 pattern in any orientation.

A146803

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0110-1100-0111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =9a(9) =19a(10) =33a(11) =63a(12) =179a(13) =631a(14) =2615a(15) =10639a(16) =41433a(17) =178083a(18) =913809a(19) =5548581a(20) =37539533a(21) =271244083

External references