Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1001-1111-0100 pattern in any orientation.

A146835

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1001-1111-0100 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =5a(9) =15a(10) =25a(11) =43a(12) =113a(13) =451a(14) =1305a(15) =6863a(16) =22081a(17) =100557a(18) =420517a(19) =2802713a(20) =14484461a(21) =126443483

External references