Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-011 pattern in any orientation.
A146252
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =5a(5) =5a(6) =15a(7) =23a(8) =69a(9) =89a(10) =411a(11) =639a(12) =3479a(13) =7047a(14) =38787a(15) =94093a(16) =630975a(17) =1734343a(18) =14199053a(19) =45390687a(20) =435447535a(21) =1674184531a(22) =18586794693a(23) =84450110411
External references
- oeis: A146252