Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation.
A146710
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =9a(9) =19a(10) =33a(11) =61a(12) =193a(13) =825a(14) =3483a(15) =14075a(16) =51829a(17) =241741a(18) =1419559a(19) =10170199a(20) =74039549a(21) =568610375a(22) =4513545321
External references
- oeis: A146710